The studies in this volume investigate how forms of knowledge and philosophical thought were transformed in the transitional period from the 13^th to the 17^th century. They highlight transformations which often took place in the shadow of the spectacular renewal projects associated with the Renaissance, but which are nonetheless fundamental to understanding the emergence of modern thought. Focusing on areas of knowledge committed more to preserving philosophical traditions than innovating, the thirteen contributions each analyze a particular source or corpus of sources to illustrate the subtle shaping and reshaping of philosophical thought that took place in this period, showcasing thus the transformative power of late medieval and early modern thought.