Spanning thirty years, the papers brought together in this volume reflect three of Professor Colish's interests as a historian of medieval scholastic thought. The first group of studies represent investigations that flowed into, and out of, the research on Peter Lombard (d. 1161) and his contemporaries that culminated in her book Peter Lombard (1994). Following the publication of that work, she next sought to discover how Peter's theology became mainstream Paris theology in the period between Lombard's death and the early 13th century, resulting in the second group of papers in this collection. Finally, the last two papers offer reflections on broader interpretive issues, considering ways in which medievalists ought to reconsider their general understanding of the story lines of high medieval intellectual history.