Anselm of Laon (� 1117)

Peter Abelard, Sic et Non (Written in stages between ca. 1121-1132)

St. Bernard of Clairvaux (ca. 1090-1153)  Founder of the First Cistercian Monastery at Citeaux

"Credo ut intelligam; intelligo ut credam."

Paris, Laon, and Chartres were three important centers of learning during the first half of the twelfth century