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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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Bernard of Clairvaux · 1148 · Other
The Life of Saint Malachy is Bernard of Clairvaux's biographical tribute to Malachy O'Morgair, the Irish archbishop of Armagh who died at Clairvaux in 1148 while returning from a pilgrimage to Rome.…
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Bernard of Clairvaux · 1149–1152 · Treatise
Bernard of Clairvaux wrote this extended letter of spiritual counsel between 1149 and 1152 for Pope Eugenius III, his former monk at Clairvaux who had been elevated to the papacy in 1145.…
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Richard of St. Victor · 1150–1173 · Commentary
Richard of St. Victor's Allegoriae in Vetus Testamentum represents the flowering of medieval allegorical interpretation within the influential school of St. Victor in Paris. Writing in the latter half of the twelfth…
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Hildegard of Bingen · 1150–1160 · Treatise
Hildegard of Bingen's Physica represents one of the most comprehensive medieval treatises on natural medicine and the spiritual properties of creation. Written during the 1150s at her monastery of Rupertsberg, this extensive…
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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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Richard of St. Victor · 1150–1173 · Treatise
Benjamin Minor stands as one of the most systematic treatments of contemplative prayer to emerge from the medieval monastery. Written by Richard of St. Victor during his tenure as prior of the…
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Richard of St. Victor · 1150–1173 · Book
Richard of St. Victor stands among the most systematic and psychologically astute writers on contemplative prayer in the medieval West. A Scottish canon who became prior of the famous Abbey of St.…
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Guigo II (Carthusian) · 1150–1188 · Treatise
The Scala Claustralium, or "Ladder of Monks," emerged from the contemplative silence of the Grande Chartreuse in the late twelfth century. Guigo II, the ninth prior of the Carthusian order, wrote this…
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Guigo II (Carthusian) · 1150–1188 · Treatise
The Duodecim Meditationes emerges from the rigorous contemplative tradition of the Grande Chartreuse, written by Guigo II during his tenure as ninth prior of the Carthusian order in the late twelfth century.…
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Hildegard of Bingen · 1150–1179 · Other
The Lingua Ignota is a constructed language created by Hildegard of Bingen during the latter half of the twelfth century, preserved in two manuscripts that contain over a thousand invented words arranged…
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Hildegard of Bingen · 1151–1158 · Treatise
Causae et Curae (Causes and Cures) stands as Hildegard of Bingen's comprehensive medical and cosmological treatise, composed during her mature years as abbess of Rupertsberg between 1151 and 1158. Written in the…
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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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Hildegard of Bingen · 1151 · Other
The Ordo Virtutum stands as the earliest known morality play in Western literature, composed around 1151 by the Benedictine abbess Hildegard of Bingen for performance by the nuns of her monastery at…
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Aelred of Rievaulx · 1153 · Treatise
Aelred of Rievaulx composed this meditation on the twelve-year-old Jesus in the temple around 1153, during his tenure as abbot of the Cistercian monastery at Rievaulx in Yorkshire. The work emerged from…
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Aelred of Rievaulx · 1153 · Treatise
Aelred of Rievaulx's Genealogia Regum Anglorum is a historical treatise tracing the lineage of English kings from their Saxon origins through the Norman Conquest to the reign of Henry II. Written in…
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Aelred of Rievaulx · 1155 · Treatise
Aelred of Rievaulx wrote this brief historical account around 1155 to commemorate the English victory over Scottish forces at the Battle of the Standard in 1138. The work takes its name from…
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Hildegard of Bingen · 1158–1163 · Treatise
Hildegard of Bingen's Liber Vitae Meritorum, composed between 1158 and 1163, stands as her second major visionary work and most systematic treatment of moral theology. Written during her mature years as abbess…
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Aelred of Rievaulx · 1160–1162 · Treatise
Aelred of Rievaulx composed this treatise on the solitary life for his sister, who had chosen to become an anchoress—a hermit sealed into a cell attached to a church for a life…
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Richard of St. Victor · 1160–1173 · Treatise
Richard of St. Victor's treatise on the four degrees of violent love represents one of the most systematic explorations of mystical ascent in twelfth-century spirituality. Written during his tenure as prior of…
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Richard of St. Victor · 1160–1173 · Treatise
Richard of St. Victor's De statu interioris hominis represents one of the most systematic medieval treatments of the soul's interior landscape and its transformation through grace. Written during the height of the…
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Alan of Lille · 1160–1170 · Treatise
The Regulae Caelestis Iuris, or "Rules of Celestial Law," emerged from the intellectual ferment of the twelfth-century cathedral schools, where Alan of Lille sought to systematize theological knowledge through the rigorous application…
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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 · 1160–1185 · Poem
De Planctu Naturae (The Complaint of Nature) stands as one of the most sophisticated allegorical poems of the twelfth century, emerging from the cathedral schools where classical learning merged with Christian theology.…
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