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John of Damascus · 730–749 · Treatise
The Fountain of Knowledge stands as John of Damascus's monumental attempt to synthesize Christian theology into a comprehensive system. Writing from the monastery of Mar Saba in the Judean desert during the…
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John of Damascus · 743–749 · Treatise
An Exact Exposition of the Orthodox Faith stands as the crowning achievement of John of Damascus, written between 743 and 749 during the height of the iconoclastic controversy that convulsed the Byzantine…
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John of Damascus · 743–749 · Treatise
John of Damascus composed his Dialectica in the mid-eighth century as an introductory handbook to philosophical reasoning for Christian theologians. Writing from his monastery of Mar Saba near Jerusalem, John recognized that…
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Peter Damian · 1040 · Treatise
Peter Damian's Antilogus Contra Judaeos stands as one of the earliest systematic medieval Christian responses to Jewish biblical interpretation and theological arguments. Written around 1040 during Damian's reforming career as a Camaldolese…
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Anselm of Canterbury · 1076 · Treatise
The Monologion emerged from Anselm's role as teacher and prior at the monastery of Bec in Normandy, where his fellow monks requested a work that would demonstrate God's existence and attributes through…
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Anselm of Canterbury · 1076 · Treatise
The Monologium represents Anselm of Canterbury's first sustained philosophical work, written around 1076 while he served as prior at the Abbey of Bec in Normandy. Composed at the request of his fellow…
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Anselm of Canterbury · 1077–1098 · Book
This collection gathers Anselm of Canterbury's most influential theological works, written during his tenure as abbot of Bec and later as Archbishop of Canterbury in the late eleventh and early twelfth centuries.…
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Anselm of Canterbury · 1102 · Treatise
Anselm of Canterbury's "On the Procession of the Holy Spirit" emerged from the theological crisis that culminated in the Great Schism of 1054, when East and West formally divided over doctrinal differences…
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Peter Abelard · 1132 · Treatise
Peter Abelard's "The Story of My Misfortunes" stands as one of the earliest and most compelling autobiographical works in Western literature, written around 1132 as a letter of consolation to an unnamed…
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William of St. Thierry · 1135–1145 · Other
The Meditative Prayers emerged from William of St. Thierry's mature period as abbot and spiritual director, written between 1135 and 1145 when he had withdrawn from active leadership to pursue contemplative life…
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William of St. Thierry · 1140 · Treatise
The Disputatio adversus Petrum Abaelardum is William of St. Thierry's theological treatise attacking the doctrinal innovations of Peter Abelard, written around 1140 during the height of scholastic controversy at the University of…
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Aelred of Rievaulx · 1142–1147 · Treatise
Aelred of Rievaulx wrote this treatise on spiritual friendship during his years as abbot of the Cistercian monastery at Rievaulx in Yorkshire, completing it between 1142 and 1147. The work emerged from…
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Peter Lombard · 1148–1151 · Treatise
The Four Books of Sentences stands as medieval Christianity's most influential theological textbook, composed by Peter Lombard while he taught at the cathedral school of Notre Dame in Paris. Writing between 1148…
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Richard of St. Victor · 1150–1173 · Treatise
Richard of St. Victor's De emmanuele stands as one of the most sophisticated Christological treatises of the twelfth century, emerging from the intellectual ferment of the Abbey of St. Victor in Paris.…
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Hildegard of Bingen · 1151 · Book
Scivias is Hildegard of Bingen's record of twenty-six visions she received over a ten-year period beginning in 1141, when she was in her forties and serving as magistra of her Benedictine community…
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Alan of Lille · 1160–1170 · Treatise
The Summa Quoniam Homines stands as one of the earliest systematic attempts at Christian apologetics in the medieval period, written by the French theologian Alan of Lille during the turbulent decades of…
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Alan of Lille · 1180–1190 · Treatise
Alan of Lille's De Fide Catholica emerged in the late twelfth century as a systematic defense of orthodox Christian doctrine against the rising challenges of heretical movements, particularly the Cathars and Waldensians…
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Alexander of Hales · 1220–1229 · Commentary
Alexander of Hales produced this extensive gloss on Peter Lombard's Four Books of Sentences during his years as master of theology at the University of Paris in the 1220s. The Sentences had…
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Hadewijch of Brabant · 1220–1250 · Poem
The Mengeldichten, or "Mixed Poems," represents the most diverse collection of verse by Hadewijch of Brabant, the thirteenth-century Flemish mystic whose writings stand among the earliest and most sophisticated expressions of vernacular…
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Beatrice of Nazareth · 1235–1250 · Treatise
A short treatise in Middle Dutch on seven ways of loving God, written by Beatrice of Nazareth (1200–1268), a Cistercian nun of the Brabantine Low Countries who entered religious life as a…
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Thomas Aquinas · 1252–1256 · Commentary
Thomas Aquinas wrote his Commentary on the Sentences between 1252 and 1256 while serving as a bachelor of theology at the University of Paris. The work represents his required academic exercise of…
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Bonaventure · 1257 · Treatise
The Breviloquium stands as Bonaventure's masterful attempt to present the entire scope of Christian theology in condensed form. Written around 1257 during his tenure as Minister General of the Franciscan Order, this…
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Thomas Aquinas · 1259–1265 · Treatise
The Summa Contra Gentiles emerged from Thomas Aquinas's concern to demonstrate the truth of Christian faith through reason alone, addressing audiences who did not share Christian assumptions about Scripture or Church authority.…
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Bonaventure · 1259 · Treatise
The Journey of the Mind into God is Bonaventure's mystical masterpiece, written in 1259 during a retreat on Mount La Verna, the same mountain where Francis of Assisi received the stigmata. Composed…
