Catholic contributions to civilisation

A reader should know, before the first century is opened, what will not be said.

The Church did not invent the book, the school, the hospital, the law, the picture, or the song. Catholics inherited all of these and, in certain places and centuries, carried them further, or carried them through a collapse, or gave them a form that later ages still use. Inheritance is not nothing. It is also not a patent. When a monk copied Virgil, he did not become the author of Virgil. When a bishop built a house for the poor, he did not cancel the sick-rooms that Roman armies had already kept for their own soldiers. When a friar read Aristotle, he was reading a Greek, often through a translation that had passed through Arabic. Honesty about the inheritance is part of the Catholic claim, not a retreat from it. The claim is that faith did this work, in these hands, and did not have to despise the mind in order to do it.

The same honesty forbids the opposite boast, the one which says that faith was the enemy and that science began on the day faith was sent out of the room. That boast is as crude as the first. The men and women in this file were not secretly irreligious. A large number of them were priests, religious, or laypeople who went to Mass. Their faith is not a decoration added by a later admirer, and it is not an embarrassment to be managed. Where a tribunal, or a pope, or a scientist who was also a priest judged a question badly, the file says so, in a sentence, and does not build a philosophy of history on the sentence.

Nothing below is offered as a complete list. A complete list would be a library. This is a beginning of the record, set in an order a mind can walk.

Before any institution, there is an instruction. It is older than the universities and older than the orders of hospitallers, and it is the reason those houses understood themselves as they did.

In the Gospel according to Saint Matthew, in the Douay-Rheims, Our Lord says: "For I was hungry, and you gave me to eat; I was thirsty, and you gave me to drink; I was a stranger, and you took me in: Naked, and you covered me: sick, and you visited me: I was in prison, and you came to me." The Church has read that page as a judgement, not as a mood. From it, and from the rest of Scripture, catechesis handed on two lists, the corporal works of mercy and the spiritual works of mercy. The corporal list is to feed the hungry, to give drink to the thirsty, to clothe the naked, to shelter the stranger, to visit the sick, to visit the prisoner, and to bury the dead. The last of these is learned especially from Tobias, who risked himself to bury the dead when burial was dangerous. The spiritual list is to counsel the doubtful, to instruct the ignorant, to admonish the sinner, to comfort the afflicted, to forgive offences, to bear wrongs patiently, and to pray for the living and the dead.

These lists were not issued as a patent for charity. Israel already knew the duty to the poor. What the Church did was to bind the duty to Christ himself, so that the hungry man is not a cause and not a project but the Lord, received or refused. That binding is why a monastery chapter can speak of the sick as Christ, and why a hospital can be a religious house and not only a civic convenience. The works of mercy are the thread. The institutions that follow are some of the ways the thread was made visible. They are not the invention of mercy, and they are not the whole of it.

In the late fourth century Saint Basil, bishop of Caesarea in Cappadocia, built outside his city a large house of charity which later ages called the Basileias, after him. It received the poor, the stranger, the old, and the sick, lepers among them, and it stood in a complex of monastic and episcopal care rather than as a private surgery for those who could pay. Gregory of Nazianzus, his friend, praised the work in terms that leave no doubt of its scale. What the buildings contained in detail is harder. Some historians of medicine call it the first hospital, in the sense of a public place where the sick were received and attended together, for which a real description survives. Others call it first a hospice, a house of hospitality for travellers and the destitute, in which care of the body was one duty among several. The dispute is real, and it is a dispute about words and about evidence, not a reason to deny the house.

What should not be said is that hospitals began as an invention of the Church. Roman military establishments already had places for sick soldiers. Greek shrines of healing were older still. Families had always nursed their own. Basil's act was different in its aim. A bishop, spending the Church's goods, made a public Christian house for people who were not useful to an army and not able to pay a physician. Houses on that pattern spread in the Christian East, kept by bishops and by monks. The West learned the same duty more slowly, and often on a smaller scale, in the infirmary of a monastery and at the gate where the poor were fed. The Rule of Saint Benedict, already studied among the Good Books, tells a community to serve the sick as Christ and to receive the guest as Christ. That is an instruction to monks. It is not a claim that Benedict drew the first plan of a ward.

When the public schools of the old empire thinned, the copying of books did not become a miracle performed by an abstraction called the Church. Particular men did it, in particular houses, and they did not save every book.

Cassiodorus, a Catholic statesman in Italy in the sixth century, left the service of the Gothic court and established a monastery at Vivarium, near Squillace in the south. He wrote the Institutions, a guide for his monks to sacred learning and to the secular letters that sacred learning still needed: grammar, the copying of texts, and the care of a library. The point of the house was that a monk should understand the book he prayed, and that the book should still exist to be understood. Vivarium did not last as a great medieval abbey. The intention did. A scriptorium, a room where books are copied by hand, is a slow machine. It is also the only machine that stood between a Latin Father and a silence of a thousand years.

Saint Benedict's monks, living by a rule that set hours for holy reading as well as for the Office and for work, became in the following centuries one of the chief means by which that machine was kept running in the West. The Rule does not contain a chapter on classical literature. What it contains is stability, a common life, and the refusal of idleness. Out of those, houses acquired scriptoria, schools for their oblates and often for boys of the neighbourhood, and infirmaries. Monte Cassino was destroyed and rebuilt more than once. The books moved. Wearmouth and Jarrow in Northumbria, founded in the late seventh century, are a clear instance rather than a legend: a monastic library large enough that Saint Bede, monk and priest of Jarrow, could write there. Bede's Ecclesiastical History of the English People was completed in 731. He also wrote on time and on the reckoning of Easter, the computus, which is astronomy put at the service of the liturgy, and on the natural world as a monk of that age could know it. Leo XIII named him a Doctor of the Church in 1899. He matters here not as a life to be retold from the study of the Saints, but as proof that a cloister could be a school of history, of Scripture, and of the calendar, and not a refusal of the mind.

Irish monastic houses belong in the same centuries, and they belong without the slogan. Columba at Iona and Columbanus on the continent, at Luxeuil and at Bobbio, are Catholic monks whose communities prayed, taught, and copied. Manuscripts of Scripture, of the Fathers, and of Latin school-authors passed through such hands, and some of them would otherwise have been lost. It is a false grandeur to say that the Irish saved civilisation. They saved a great deal, in certain places. Other books survived in Italy, in Spain, at Constantinople, and, for Greek science, through translators working in Arabic. A Catholic does not need the false grandeur. The true service is large enough.

In the eighth century and the ninth the palace of Charlemagne drew masters to a court school, and the man who stands at the centre of that work is Alcuin, a deacon formed at York and later abbot of Saint Martin's at Tours. He was not a founder of universities, which did not yet exist in their later form. He corrected texts of Scripture and of the liturgy, wrote on the liberal arts, and pressed the cathedral and monastic schools of the Frankish world to teach. The correction of a biblical text is a humble art and a necessary one. A Church that prays from a corrupt copy is a Church that will, in time, preach a sentence God did not give. Alcuin's kind of labour is easy to despise because it does not look like a discovery. It is how a tradition remains itself.

The Roman chant belongs with this custody of holy things, and it must be stated with the same care already given it in the study of the Good Books. The chant of the Mass and of the Divine Office is the Latin Church's own liturgical song, formed across centuries in Roman and Frankish churches and in monasteries. It bears the name of Saint Gregory the Great. The books of chant that have come down are later than his lifetime. The name is the Church's memory of him, not a claim that he composed every melody now sung under it, and not a claim that the Church owns music. Other Christian rites have their own chant. Other religions sing. What Catholics have is this repertoire, kept for the altar, and it is enough to honour it without stealing the rest of the world's song.

The Church, living in time, has to judge cases. From early centuries bishops gathered the canons of councils and the letters of popes in collections, so that a sentence given in one place could be known in another. Those collections disagreed. In the twelfth century, at Bologna, a teacher called Gratian set the discordant canons side by side and tried to reconcile them. Very little about his person is certain. The book is certain enough. It is called, in its own aim, a concordance of discordant canons, and it is commonly called the Decretum. It became the textbook of the Church's law. It was not a code which a pope sat down and enacted in the modern manner. It was a teacher's ordering of the law the Church already had.

The next step was papal. Pope Gregory IX commissioned Saint Raymond of Peñafort, a Dominican, to gather the decretals, the later papal rulings, into a book that could be taught. That collection was promulgated in 1234. Over the following centuries the books of canon law grew into the body called the Corpus. In the twentieth century the Latin Church received a Code, prepared under Pope Saint Pius X and promulgated under Pope Benedict XV in 1917, and then a new Code, promulgated by John Paul II in 1983. The Eastern Catholic Churches received their own Code in 1990. The point of naming these books is narrow. Canon law is the Church's attempt to give pastors a common rule for sacraments, offices, penalties, and the care of souls, so that justice is not a local mood. The 1983 Code is law for the Latin Church. It is not a revelation, and it is not a substitute for the Gospel. A reader who wants the theological books should go to the study of the Good Books. A reader who wants the statutes should go to the Code. This file only refuses the pretence that the Church lived for twenty centuries without having to decide cases.

The just-war tradition is a second work of judgement, and it is stated here once, not as an essay on any modern war. Saint Augustine, author of the City of God, taught that a Christian people is not forbidden every use of force, and that a war is not made good by victory. He tied the question to the correction of injury, to lawful authority, and to peace as the only worthy end. Saint Thomas Aquinas, in the Summa, asked whether it is always a sin to wage war, and he gave three conditions: the authority of the prince, and not a private man's anger; a just cause; and a right intention, so that the war is ordered to peace and not to cruelty or greed. Later Catholic teaching added further tests of prudence: that the harm to be resisted be lasting, grave, and certain; that other means have failed or be useless; that there be a serious prospect of success; and that the evils caused by the arms not be worse than the evil opposed. The weighing of those tests belongs to the people who hold responsibility for the common good, not to a private taste for glory. The tradition is a limit. It is not a blessing pronounced in advance over every army that asks for one. Nothing in it is a subject for a quarrel in this file. The quarrel would be about the news. The teaching is about the conditions under which killing in public war is not mere murder.

The same centuries that gathered law also built houses for the sick on a new scale in the Latin West.

In Jerusalem, before the First Crusade took the city, merchants from Amalfi had established a hospital for poor pilgrims. After 1099 the master of that hospital, Blessed Gerard, enlarged the work. On 15 February 1113 Pope Paschal II, by the bull which begins Pie postulatio voluntatis, took the hospital under the protection of the Holy See and allowed the brothers to elect their master. That is the papal beginning of the Order of the Hospital of Saint John. The care of the sick was the original purpose of the work. Under the next master, Raymond du Puy, the order also became military, a fact which an honest record neither hides nor uses to cancel the hospital. The brothers built houses along the pilgrim roads as well as in the Holy Land. The later history, Rhodes and Malta and the modern orders that claim the inheritance, is a long story of its own. What belongs here is the twelfth-century fact: a Catholic religious order, recognised by a pope, existed in order to nurse the poor pilgrim, and understood the nursing as religious life.

At Paris the great hospital called the Hôtel-Dieu is tied, in the Church's memory, to Saint Landry, bishop of Paris in the seventh century, who is said to have founded a house for the sick and to have sold church goods to feed the poor in a famine. Contemporary charters for that founding are not in our hands. The memory is tradition, and the documentation of the buildings is later. What is not tradition is the institution itself: for centuries the Hôtel-Dieu, standing by the cathedral, was the hospital of Paris, served by religious women and by the bishop's city. A reader may hold the seventh-century date lightly. He should not hold the hospital lightly. It is one of the clearest Western instances of a Catholic city treating the sick poor as a permanent public charge of the Church, and not as an occasional alms.

The university, in the form that still means a body of masters or scholars with a privilege to teach and to grant a degree, grew in Catholic Europe in the twelfth century. It did not grow out of nothing, and it was not decreed into existence by a single bull which invented study. Cathedral schools and monastic schools were already old. Chartres, Laon, and the school of Notre-Dame at Paris had famous masters before there was a university of Paris. Islamic houses of learning were already old as well. What was new was the corporation: students or masters formed a universitas, a legal body, and sought privileges from emperor or pope so that the body could outlive the men and the quarrels of one town.

At Bologna the new thing gathered around the teaching of Roman law. Irnerius, early in the twelfth century, is remembered as the master who brought the Emperor Justinian's law books back into daily teaching. The date 1088, which the University of Bologna itself sets on its emblem, is a traditional date, fixed by a nineteenth-century commemoration. Historians of the schools judge that an organised university, a real guild of teachers and students with continuity, is more safely placed later in the twelfth century. In 1158 the emperor Frederick Barbarossa issued the Authentica Habita, a privilege for scholars. Gratian's canon-law teaching sat beside the civil law, so that Bologna became the place where the two laws of Catholic Christendom, the emperor's Roman law and the Church's law, were studied together. Papal privileges came. They confirmed and protected a school that was already alive. They did not summon it out of an empty field. To call Bologna a Catholic foundation is right, if the words mean a school of Catholic Europe, teaching the Church's law as well as the civil law, and looking to the pope as well as to the emperor. To say that a pope founded it by charter in 1088 is not right.

Paris grew from the cathedral school of Notre-Dame, and from the masters who taught on the Mount and on the bridges, into a university of masters, especially strong in theology and in the arts. The troubles of the early thirteenth century, when the schools were dispersed, ended in the bull Parens scientiarum of Pope Gregory IX, in 1231. He called Paris a mother of the sciences and set protections and rules for masters and scholars, including cautions about how the new books of natural philosophy were to be read. That bull is a papal confirmation and a constitution. It is not the birth certificate of a school that had no teachers before it. Robert de Sorbonne, chaplain of the king, founded a college for poor students of theology in 1257. The college gave its name, much later, to a great house of learning. He did not found the university. A reader who says "the Sorbonne" and means the thirteenth-century university has collapsed a college into a studium.

Oxford is the one most easily mis-told. Schools of Catholic England were gathered there by the later twelfth century. There is no honest single year of foundation, and there is no papal bull that created it. In 1209 a deadly quarrel with the town sent scholars away, and some of them settled at Cambridge, which is how the second English university begins. In 1214 a papal legate settled terms on which teaching could return to Oxford. The medieval jurists later called Oxford a studium generale by custom, not by a founding charter of pope or emperor. It was a Catholic school in Catholic England, its scholars treated as clergy, its theology the theology of the Latin Church. It did not remain a Catholic university. The break of the English Church with Rome in the sixteenth century took Oxford and Cambridge with the crown. A Catholic may honour the medieval studium. He may not speak as if the modern colleges were still houses of the Catholic faith.

None of the three was a seminary alone, and none of them was a secular research institute in the later sense. They taught the arts, then law or medicine or theology. The degree was a licence to teach. The Pope's interest was real, because theology and canon law were the Church's own sciences, and because a master who taught heresy taught it with a public rank. The king's interest was real, because he needed lawyers. The new corporation served both, and it belonged wholly to neither. That double life is the accurate description. A slogan that the university was an invention of the Church does not fit the evidence.

Art enters this record in the same century, and only as an example.

The cathedral of Our Lady at Chartres was rebuilt after the fire of 1194. The west front kept work from the earlier church. The great campaign that followed raised the nave, the choir, the sculpture of the portals, and the glass, for the liturgy of a Catholic diocese. Bishops, canons, townspeople, and masons all had a share. The building is theology in stone only in the sense that a church is built to be a church: the Mother of God honoured, the saints standing at the doors, the light arranged for the Mass. It is not a proof that the Church owns architecture. Islam built great mosques in the same ages. The communes of Italy built civic halls. What Chartres shows is what a Catholic bishop's church could be when a city put its skill into the house of God, and when the skill was high. A reader who uses it as a weapon against every other beauty has not looked at it. A reader who calls it a mere museum has not looked at the altar either.

Two figures of the twelfth century keep the file from jumping, as slogans do, from monks with quills to a sudden scientific age.

Hildegard, abbess of the Rupertsberg, was a Benedictine. She died in 1179. She wrote theology, music, and accounts of the natural world and of the body, the writings known as the Physica and the Causes and Cures. Benedict XVI named her a Doctor of the Church in 2012. Her natural writing is monastic learning, mixed with a vision of creation as a whole in God's hands. It is not a founding of experimental medicine, and it should not be advertised as if a modern clinic could take its recipes unexamined. It matters because a cloistered Catholic woman of that century was expected, by her own Church, to know the world as creation and to write down what she held to be its order. The sacred songs she composed belong with the chant already named: one abbess's offering, not a claim upon all music.

The other fact is the movement of books. In the twelfth century, at Toledo and elsewhere, Christian scholars, Gerard of Cremona among them, translated Greek science and philosophy from Arabic into Latin, often with the help of men who knew the Arabic. Aristotle's books on nature, Galen's medicine, and a large geometry and astronomy entered the Latin schools by that road. The road ran through Islamic civilisation. A Catholic record that hides the road is a false record. The friars of the next century did not invent nature. They inherited a library that had just become much larger, and they tried to read it as Catholics.

Saint Albert the Great was a Dominican, a German by birth, a master at Paris and at Cologne, and for a short time bishop of Regensburg, an office he laid down. He died in 1280. He wrote on almost everything the new library contained: logic, theology, the animals, the plants, the minerals, the heavens, and the soul. Some particular discoveries that popular books hand him are insecure, and they are left out here rather than polished into a legend. What is secure is the scale and the aim. He set out to make the natural philosophy of Aristotle intelligible to the Latins, and he did it as a friar, in commentaries and treatises that walk the creatures one by one. He thought that the world, being made, is intelligible, and that a Christian offends God if he is too proud to look. Pope Pius XI canonised him in 1931 and named him a Doctor of the Church. In 1941 Pope Pius XII named him patron of those who study the natural sciences. The patronage is the Church's own judgement, centuries later, that this kind of work was not a hobby at the edge of holiness.

Saint Thomas Aquinas was his student. The Summa, its shape, its unfinished end, and the way a beginner should read an article, are set out in the study of the Good Books and are not repeated. What belongs in this file is the pair of convictions that made his work a contribution to the study of nature and not only to the study of dogma.

The first is that the world is created and is therefore not God, and that because it is not God it can be studied in its own causes. Creation is not a rival explanation which a physicist is forbidden to finish. It is the reason there is a world with an order to finish. Thomas distinguishes what reason can know of God from the things that are known only because God has spoken. The distinction is a protection for both sides. It stops a theologian from pretending that a verse is a lecture in astronomy. It stops a philosopher from pretending that the silence of a science is the absence of God.

The second is that grace does not abolish nature. It heals nature and raises it. A mind that studies plants, or law, or the movement of the stars, is not on holiday from the faith, and a mind that believes is not required to switch the other mind off. The famous ways in which Thomas argues that God is, in the opening of the Summa, begin from things a person can notice in the world: change, cause, contingency, degrees, and the order of things that lack intelligence. They are not experiments. They are not a substitute for the Creed. They are a Dominican's refusal to treat faith as a mood with no purchase on what is real. A reader who wants the articles themselves should open the Summa at New Advent, or a printed copy of the same English Dominican translation, and should remember the rule already given: an objection is not his conclusion.

The just-war conditions already stated are his as well, in the second part of the second part. They are mentioned here only so that a reader sees the same mind at work on a public duty and on the creatures. He was not a naturalist who happened to be religious, and not a mystic who despised bodies. He was a Catholic friar who thought that both the creed and the creature deserved the full strength of the mind.

Roger Bacon was an English Franciscan of the thirteenth century. The year of his birth is not secure, and this file will not invent one. He taught in the schools of Paris and of Oxford, and he entered the Friars Minor around the middle of the century. Pope Clement IV, who had known of him before his election, commanded him in 1266 to send his writings. Bacon answered with the Opus maius, and with related works, sent about 1267 or 1268. The book is a plea for a reform of study. He wanted languages, because a theologian who cannot read the sacred page in a learned tongue is at the mercy of copies and of glosses. He wanted mathematics. He wanted perspectiva, which is optics, the geometry of light, of the eye, and of lenses. And he wanted what his Latin calls an experimental science: a knowledge that does not stop at a neat argument, but goes on to experience, so that the mind is settled by trial and not only by a chain of reasons.

That last phrase has been modernised by admirers until Bacon sounds like a man of the nineteenth century born too soon. He was not. His experience includes the ordinary trial of nature, and it also includes a wider and stranger appetite for hidden powers, alchemy among them, which he was careful to distinguish from the magic that calls on demons. He did not found a laboratory in the later sense. He did not invent the telescope. He did write of lenses and of arrangements by which distant things might be made to look near, which is a speculation in optics, not a working instrument on a tower. He did not invent gunpowder. Mixtures of that kind were already known in China. He wrote of an explosive powder, and historians dispute how far his report is an original European recipe and how far it is a description of something he had met. The dispute can stand. It does not make him empty. A friar who told a pope that the schools were vain unless they learned Greek and Arabic, measured the light, and tested what they claimed, was pushing Catholic learning towards the world as it is. Stories that the order imprisoned him for science are too uncertain to repeat. What is certain is the book, and the pope who asked for it.

Early in the fourteenth century Theodoric of Freiberg, a Dominican, gave an account of the rainbow by the path of light through a drop of water: light bent as it enters the drop, reflected within it, and bent again as it leaves, the different colours leaving at different angles. It is a real piece of natural philosophy, worked out with experiment and with geometry, inside the order that had taught Albert and Thomas. A similar account was reached in the Islamic world, by Kamal al-Din al-Farisi, in the same age. The double fact is the honest one. Catholics do not need Theodoric to have been the only man on earth who looked carefully at a rainbow. They need not forget that a friar did look, and did understand what he saw, three centuries before the explanation was commonly told as if it had begun with a later French philosopher.

Medicine in the medieval schools was a university art, taught at Bologna, at Paris, at Montpellier, and elsewhere, from Greek and Arabic books and, increasingly, from the body.

Mondino de Luzzi, a teacher of medicine at Bologna, produced in 1316 an Anatomy which became the textbook of dissection for two centuries. He dissected. The old slander that the medieval Church forbade the opening of a body cannot survive a public professor doing it, year after year, in a papal and imperial university. Anatomy did not begin with him. Galen's errors were still in the room. Mondino's place in the record is that a Catholic school treated the body as a text a physician was obliged to read, and not only as a relic of Adam to be left untouched.

Guy de Chauliac, a Catholic physician in the service of the popes at Avignon, completed his Great Surgery in 1363. It is a full surgical teaching: wounds, fractures, the plague he had himself survived, the instruments, and the duties of the surgeon, including the duty of knowing anatomy and of not abandoning the sick. He is not the inventor of surgery. He is a papal physician who set the craft in an order that other surgeons could learn, at a time when the papacy itself sat in France. The office and the book are the contribution.

In 1543 two Catholic laymen published books that changed what the schools had been repeating.

Andreas Vesalius, from the Low Countries, brought out On the Fabric of the Human Body, an anatomy built on his own dissections and on plates that showed what the knife had found. He corrected Galen where Galen was wrong, which was often, because Galen had dissected animals and argued across to man. Vesalius was not a rebel against the Church. He was a Catholic physician doing, with greater skill and greater severity, the work Mondino had already called legitimate. Legends that turn his later years into a simple tale of the Inquisition are left out. The book is enough, and the book is his.

Nicolaus Copernicus, a cathedral canon of Warmia, in minor orders and not a priest, dedicated On the Revolutions of the Heavenly Spheres to Pope Paul III. The book appeared in 1543, the year of his death. He was not the first man to suggest that the Earth moves. A Greek had said it in antiquity, without the mathematics to unseat the old system. Copernicus built a full mathematical account in which the Earth turns daily and travels yearly about the sun, and he offered it as the true arrangement, not as a toy. An unsigned preface, the work of Andreas Osiander and not of Copernicus, advised the reader to treat the system as a device for calculation. The preface is not the book. Later, in the tensions of the next century, the book was restricted pending correction. That restriction is a fact. It is not the fact that cancels the dedication, or the fact that a Catholic churchman did the work. The heavens were studied by a canon. The study was not a hobby hidden from his Church.

The reform of the calendar is a case in which the credit must be shared exactly, because popular memory gives it to the wrong single name, or to the Church as a cloud.

The Julian calendar had drifted from the sun. A Catholic physician and astronomer, Luigi Lilio, worked out a plan of reform and died before it was adopted. His brother brought the plan to Rome. Pope Gregory XIII issued the reform in 1582, cutting ten days from that October and altering the leap years so that the drift would not return. The Jesuit Christopher Clavius, professor of mathematics at the Roman College, was the man who examined, explained, and defended the reform, and who wrote the demonstrations by which reluctant countries could be answered. The calendar is Gregory's act, Lilio's plan, and Clavius's mathematics. It is a Catholic work of astronomy in the service of the date of Easter, which is to say in the service of the liturgy. It is not a proof that Jesuits invented time.

The Society of Jesus itself had been approved by Pope Paul III in 1540, the order Saint Ignatius of Loyola had gathered. Its contribution to learning is easy to overclaim and easy to ignore. The accurate core is the school. The Jesuits were founded for the defence and propagation of the faith, and for that they built colleges, not only houses of formation for their own novices but schools for boys and for older students who were not going to be priests. The plan of those schools was written down in the Ratio Studiorum, settled in its standard form in 1599: grammar, humanities, rhetoric, philosophy, mathematics, and, for those who went on, theology, with a fixed order of classes and of repetition. A ratio is a method, not a discovery of a science. Its importance is civilisational. For two centuries and more, across Catholic Europe and in the missions, a very large number of the men who governed, pleaded, and studied had been taught by this one order, in this one plan. The suppression of the Society in the later eighteenth century, and its restoration in the nineteenth, broke the chain and then resumed it. The chain was a school system. It was not the Church's ownership of education.

Where the schools met a civilisation that already had its own learning, the honest description is transmission, not conquest of the intellect. Matteo Ricci, a Jesuit, lived in China until his death at Beijing in 1610. With the Chinese scholar Xu Guangqi he put Euclid into Chinese, and he carried clocks, maps, and astronomical instruments as well as the catechism. The geometry was European, much of it taught by Clavius's editions. The Chinese collaborator was necessary. Ricci did not discover Euclid, and he did not found Chinese astronomy. He is in this record because a Catholic religious spent his life making a real science speak in another tongue, as a work of friendship and of mission together.

Painting, like architecture, is an example here and not a property.

Fra Angelico was a Dominican friar, Guido di Pietro in the world, who painted altarpieces and the frescoes of the convent of San Marco in Florence in the first half of the fifteenth century. He died at Rome in 1455. The Annunciation and the small scenes in the friars' cells were made for men who prayed, to be looked at on the way to choir and in the silence of a cell. John Paul II beatified him in 1982. He is a painter who was a Catholic religious, and whose art is incomprehensible if it is peeled off the Order of Preachers and off the Mass. He is not the moment at which painting became serious. Giotto was before him. The icon painters of the East were before him. The claim is only that this friar's work is one of the high things the Catholic religious life has produced with a brush, and that the Church has judged the man holy.

Michelangelo Buonarroti was a Catholic layman. Between about 1508 and 1512 he painted the ceiling of the Sistine Chapel for Pope Julius II. The chapel is the pope's palace chapel, the place where the cardinals meet to elect a bishop of Rome. The ceiling is the creation, the fall, and the prophets, painted by a sculptor who would rather have been back at the marble. It is a contribution of a Catholic artist working for the papacy. It is not a claim that the Church owns the art of painting, or that every painter of that age was a saint, or that beauty of this kind is a proof of doctrine. A doctrine is proved by its truth. A ceiling can make a person willing to look up. That is already a great deal, and it is the amount this file will claim.

Galileo Galilei was a Catholic layman of Pisa and Florence. From 1609 he turned telescopes to the sky and published what they showed: mountains on the Moon, four moons travelling about Jupiter, the phases of Venus. Those observations mattered because they were very hard to reconcile with a simple picture in which every light in the sky circled the Earth and the heavens were another kind of stuff from the Earth. He defended the system of Copernicus as the true system. In 1633 a tribunal of the Roman Inquisition condemned that defence and required him to abjure. He lived his last years under a confinement. Historians still dispute the politics of the trial, the weight of his mockery, and the degree of his proof. The dispute is named and then left. It is not a doctrine. A tribunal is not the Church teaching the creed. In 1992 Pope John Paul II, receiving the result of a pontifical study of the case, acknowledged that the affair had been mishandled, and that Scripture had been made to carry a cosmology it was not given to settle. The acknowledgement is the Church's. It does not make Galileo a theologian, and it does not make his telescope a temporary embarrassment. He was a Catholic who saw what was there, and who suffered from a judgement the Holy See has since treated as a failure of discernment. Faith is not served by hiding either half.

Nicolas Steno, born Niels Stensen in Denmark in 1638 and raised a Lutheran, became one of the founders of the study of the Earth's strata. His Prodromus of 1669, the dissertation on a solid naturally contained within a solid, argued that the layers of the earth were laid down in succession, the lower before the upper, and that the bodies dug out of them, which men called tongue-stones, were the teeth of sharks and the remains of living creatures, not sports of the rock. That is the principle later called superposition, and it is the beginning of a serious geology. The man who wrote it then entered the Catholic Church, was ordained a priest, and was made a bishop. He died in 1686. John Paul II beatified him in 1988. The sequence matters. The science was not a youthful error corrected by ordination, and the ordination was not a hobby beside the science. One Catholic life contained both, and the Church has honoured the life.

Blaise Pascal was a Catholic layman, born at Clermont in 1623 and dead at Paris in 1662. As a young man he worked in geometry. With Pierre de Fermat he took up the problem of how to divide the stakes of an unfinished game of chance, and that correspondence is one of the beginnings of the mathematics of probability. It is not a claim that no one had ever counted chances before. In 1648 his brother-in-law, Florin Périer, carried barometers up the Puy de Dôme at Pascal's asking, and showed that the height of the mercury falls as the air above it thins. The experiment told against the idea that nature simply abhors a vacuum, and it told for the weight of the air. Pascal also built a calculating machine. In his last years he wrote the fragments now called the Pensées, a defence of the Christian religion left unfinished at his death, and he stood with the rigorist circle of Port-Royal. The theological quarrel of that circle is not the subject here. The subject is a lay Catholic for whom experiment, mathematics, and the wager of faith were not three lives. A reader who wants his religious book should read it as his, and not as a set of slogans pulled out of the fragments.

Francesco Maria Grimaldi was a Jesuit. His work on light, published in 1665 after his death, described the bending of light that he called diffraction, a spreading into shadow which the older geometry of straight rays did not allow. Later optical theory had to reckon with what he had seen. He is here as one verified case of a Jesuit priest doing original natural philosophy, not as a representative of a hundred others hastily named.

The care of the sick in this century has two Catholic founders who should not be lost among the instruments.

Saint Camillus de Lellis, a priest, gathered a company of men to nurse the sick, including the plague-stricken, with a discipline that treated the ward as the place of their vocation. The popes of his lifetime recognised the company, the Ministers of the Sick. He died in 1614. The Church honours him as a patron of the sick and of those who nurse them. The red cross he put on the habit is the sign of his order. It is not the Geneva cross of the nineteenth century, and the two should not be confused in order to win an argument about who thought of a shape.

Saint Vincent de Paul, with Saint Louise de Marillac, founded the Daughters of Charity in 1633, women who bound themselves to serve the poor and the sick in their houses and in hospitals, without the enclosure that would have kept them from the work. Vincent also founded the Congregation of the Mission for priests. The contribution is not a theory of social justice written for a later century. It is a concrete Catholic works of mercy, organised so that it would survive the death of a charismatic founder: rules, vows, hospitals, foundling children, galley prisoners, and the ordinary poor of a parish. A Church that can point to Basil in the fourth century and to Vincent in the seventeenth is not pointing at a mood. It is pointing at a habit.

Maria Gaetana Agnesi was a Catholic laywoman of Milan. In 1748 she published the Analytical Institutions for the Use of Italian Youth, a textbook of algebra and of the new calculus, written clearly enough that a student could learn what the great geometers had been doing. Pope Benedict XIV appointed her to a chair of mathematics at Bologna in 1750. She did not build a life as a public professor. She turned, in her later years, to the care of the poor and the sick, and died in 1799. A curve treated in her book acquired, in an English translation, the absurd name of the witch of Agnesi, by a misunderstanding of an Italian word for a curve. She did not discover the curve, which earlier geometers had already discussed, and she did not practise magic. Her contribution is the book, the papal recognition of a woman as a mathematician, and a life that refused to treat either the mathematics or the works of mercy as a betrayal of the other.

Alessandro Volta, a Catholic layman of Como, described the pile of alternating metals in a liquid, the voltaic pile, in 1800. It was the first device that would give a continuous electric current, and almost everything electrical in the century that followed depends on a current someone can keep flowing. He was a professor, a correspondent of the learned societies, and a Catholic. He was not a priest. The pile is enough to name. It does not need a legend.

André-Marie Ampère, a Catholic layman of Lyon, took up the magnetic effect of a current, which a Danish physicist had just found, and in the 1820s built the mathematics of the force between currents. Electrodynamics, as a science with laws and measures, is in large part his. The unit of current bears his name. He practised the faith through a life of private grief, and he died a Catholic in 1836. He is named here because his Catholicism is his own, not a guess from the fact that France had Catholic kings, and because the work is real.

Gregor Mendel was an Augustinian. He was born Johann Mendel in 1822, in a village of Moravia in the Austrian Empire, and he was received into the Abbey of Saint Thomas at Brno in 1843, taking the name Gregor. He was ordained a priest in 1847. The abbey was a teaching house. Its abbot wanted friars who could staff the schools, and Mendel was sent to study at Vienna. He did not pass by the road of a famous professorship. He was given a garden.

For about eight years, as he himself described the labour, he crossed varieties of the garden pea, keeping the offspring apart, and counting. He followed single characters through the generations: the form of the seed, the colour of the seed leaves, the height of the plant, and others. He found that a character could disappear in the mixed generation and return in the next in a stable proportion, and that the characters were passed on as discrete factors, not as a blending in which both parents are dissolved. He read the work in two meetings of the natural history society of Brno, in February and in March of 1865. It was published in 1866, in the society's proceedings, under the title Experiments on Plant Hybrids. He became abbot in 1868. The office, and a long quarrel about the taxation of the monastery, ate the years he might have given to further crosses. He died in January 1884.

The paper was not understood, and it was not suppressed. The Church did not forbid it. The scientific world of his day did not see what it was. Around 1900, Hugo de Vries, Carl Correns, and Erich von Tschermak, working separately, came to the same patterns and then found that a friar in Brno had published them a generation earlier. The word gene is later. The tidy laws printed in schoolbooks are a later packaging of what he counted. His numbers have been called, by some statisticians, neater than life usually is, and that charge is itself disputed. None of these cautions removes the work. An Augustinian priest, in a monastery garden, established by counting that inheritance has a structure, and he established it so well that the science later called genetics recognises him as its founder. The faith that put him in the abbey did not have to be set aside for the counting to be true.

Louis Pasteur was a Catholic layman, a chemist by formation, born in 1822 and dead in 1895. He showed that fermentation is the work of living organisms, and he showed, with flasks so bent that dust could not fall into a sterile broth, that life does not simply appear in the broth because the air touches it. Those swan-neck flasks are a real experiment against spontaneous generation, not a metaphor. He devised the heating now called pasteurisation, which saved wine and milk from the organisms that spoil them. He developed vaccines, weakened agents of disease given so that the body learns them, for anthrax in animals and, at the end of his life, for rabies in a human being. He did not do the whole of the germ theory alone. Earlier men had guessed parts of it, and Robert Koch, who was not a Catholic contribution of this file, identified particular bacteria with a rigour Pasteur did not always match. The quarrel between their schools is a quarrel inside science. It does not touch the fact that Pasteur was a practising Catholic, buried as one, who destroyed a comfortable error about life from nothing and put a tool in the hands of physicians.

A sentence often hung on him, about a little science taking a man from God and a great deal of science bringing him back, is not used here. A quotation this file cannot vouch for is a quotation it will not wear. His baptism, his work, and his death in the Church are enough.

The colleges had towers. Angelo Secchi, a Jesuit, directed the observatory of the Roman College in the middle of the nineteenth century and turned the spectroscope on the stars. A spectrum is the light of a star spread into its colours, and the colours carry lines that tell what elements are burning there. Secchi sorted the stars into spectral classes by those lines. He was not the last man to classify stars, and the later Harvard classes are the ones textbooks print. He was among the first to make the physical constitution of a star, and not only its place on a chart, the subject of a Catholic observatory's daily work. He died in 1878. When the new Italian state took the Roman College, that observatory went with it.

Pope Leo XIII did not accept that the Holy See should therefore have no telescope. He had the Vatican Observatory set up in 1888, the instruments placed in the Tower of the Winds, and he entrusted the beginning to the Jesuit Francesco Denza. In 1891 a large photographic telescope was at work on the Leonine Tower, and the observatory took its share of the international Carte du Ciel, the mapping of the sky by photography. The observatory's own history records the sequel without romance. The Roman sky grew too bright. Under Pius XI the work was moved to Castel Gandolfo. Later in the twentieth century, still under Jesuit direction, the observatory joined the University of Arizona and placed a modern telescope on Mount Graham, because even the Alban hills were no longer dark enough. A pope founding an observatory so that the Church would do astronomy, and not only talk about it, is a contribution of a particular kind. It does not make every later scientific fashion a dogma. It makes the opposite slander difficult to tell with a straight face.

Georges Lemaître was a Belgian diocesan priest. He was born in 1894, served in the artillery in the Great War, and was ordained in 1923. He studied the new physics of the heavens, Eddington among his teachers, and he spent his working life as a professor at the Catholic University of Louvain.

In 1927 he published, in the annals of the scientific society of Brussels, a paper on a homogeneous universe of constant mass and growing radius, which could account for the speeds at which the distant nebulae are receding. The mathematical possibility of an expanding universe had already been written down, in 1922, by Alexander Friedmann, who was not a Catholic and who is named here so that Lemaître is not given a priority he would not have claimed. What Lemaître did was to join the expansion to the observations, and to treat it as the physical history of the real world. In 1931, in a short paper in Nature, he went further. If the universe is expanding now, it was smaller in the past. He proposed that it had come from a primeval atom, a single quantum in which the mass of the world was packed, which had divided and begun the expansion. He called the picture, in a talk of that period, a fireworks theory, the slow ages we see being the smoke and ash of a very rapid beginning.

The phrase Big Bang is not his. Fred Hoyle, who disliked the idea of a beginning, used it in a radio talk in 1949, and the nickname stuck. The physics has been rewritten many times since 1931. The primeval atom in Lemaître's own form, with its radioactive disintegration, is not the model a cosmologist writes today. The direction of the idea is the direction the evidence has favoured: a universe with a history, denser and hotter in the past, not an eternal unchanging stage. That direction was first walked, as a physical proposal tied to the nebulae, by a priest of the Catholic Church.

He was determined that the proposal should be judged as physics. In November 1951 Pope Pius XII, addressing the Pontifical Academy of Sciences, spoke of the sciences in a way that pressed this cosmology towards the doctrine of creation. Lemaître, who later presided over that same Academy, thought the pressing unwise, and he said so, with the respect of a priest and with the stubbornness of a scientist. He was right to distinguish the two. A hypothesis about the early density of matter is not a proof of the creed, and it is not a disproof of it. The creed confesses that God made all things, whether the making looks, to a particular century's instruments, like a steady world or like a beginning in time. If tomorrow's evidence altered the model, the creed would not fall down, because the creed was not built on the model. Lemaître's reluctance is part of his Catholic intelligence, not a secret doubt.

The line which this whole file has been preparing can now be said in plain words. Faith is not the enemy of science, and it does not need to be set against it. The Church's own teaching is that the God who reveals is the God who made the world, so that a real truth of faith and a real truth of reason cannot finally contradict one another. Where they seem to clash, someone has misunderstood the doctrine, or the observation, or the reach of both. That is what the First Vatican Council taught when it taught the relation of faith and reason, and it is what a priest with a telescope and a differential equation was living. The Galileo tribunal failed the distinction. Lemaître kept it. The distinction is the Catholic one, and it is older than either of them.

Jérôme Lejeune was a French physician and geneticist, a convinced Catholic, who died in 1994. In 1959 a paper under the names of Lejeune, Marthe Gautier, and Raymond Turpin reported that children with Down's syndrome have an extra chromosome, the condition later called trisomy 21. Lejeune's name stood first. Gautier afterwards said that the cultures and the observation were her work, and that her share had been understated. The credit is disputed. This file will not settle a laboratory quarrel by piety, and it will not use the quarrel as a stick. What is secure is that the chromosomal nature of the syndrome became known through that collaboration, and that Lejeune, for the rest of his life, spent his science and his public speech in the defence of the patients he served, including the unborn. Pope Francis has declared him Venerable. That is a stage in a cause. It is not a canonisation, and it is not a verdict on the dispute about the slides. It is the Church taking seriously a Catholic physician who would not separate what he saw in the microscope from what he owed to the persons whose cells he counted.

A reader who has come this far should be able to repeat the record without the slogans.

Cassiodorus, who left a public career to found the house at Vivarium, the Benedictine houses, and Bede, and the Irish communities, and Alcuin, kept books and taught. They did not rescue every book, and they were not the only keepers. Basil built a great house for the sick poor, and historians still dispute the exact medical rank of it. The Hospitallers, recognised in 1113, and the Hôtel-Dieu at Paris, and Camillus, and Vincent de Paul with Louise de Marillac, made the nursing of the sick a religious work with institutions that could last. Gratian and Raymond of Peñafort and the later codes gave the Church a law that can be studied and amended. Augustine and Thomas gave a limit to war, not a hymn to it. Bologna, Paris, and Oxford grew as schools of Catholic Christendom, each in a different relation to pope, emperor, bishop, and town, and the English pair did not remain Catholic. Albert, Thomas, Bacon, and Theodoric studied nature as friars. Mondino, Guy de Chauliac, and Vesalius studied the body. Copernicus, a canon, reset the heavens, and paid, in a later generation's tribunal, a price the Church has since called a mishandling. Clavius, with Lilio's plan and Gregory XIII's authority, repaired the calendar. The Jesuits built a school system and staffed observatories. Secchi read the spectra of stars. Leo XIII set up a Vatican observatory so that the Apostolic See would do the work. Agnesi, Volta, Ampère, Mendel, Pasteur, Steno, Pascal, and Lemaître, priests and laypeople, added particular true things to mathematics, to electricity, to inheritance, to medicine, to the history of the earth, and to cosmology. Chartres, the Roman chant, Fra Angelico, and the Sistine ceiling are works of Catholic faith and of human skill. They are not a title deed to art.

The list is short on purpose whenever the evidence was thin. Famous names whose Catholicism could not be stated without a guess have been left out. Disputed priorities have been called disputed. No picture has been fastened to this file, because an image that has not been fetched and seen is a decoration this study will not wear.

This file is a beginning of the record, not a claim that the list is complete. The centuries are longer than these pages. Other physicians, other sisters in other wards, other masters in other schools, and other priests at other eyepieces have a place in the same story, and they are not diminished because their names are not written here. What is written here is enough to bury two lies: the lie that everything worth having began with the Church, and the lie that the Church had to be pushed aside before the mind could work. Between those lies stands the actual history, which is Catholic, uneven, and, in the places named, glorious.