It is commonly supposed that certain elements of medieval philosophy are uncharacteristically preserved in modern philosophical thought through the idea that mental phenomena are distinguished from physical phenomena by their intentionality, their intrinsic directedness toward some object. The many exceptions to this presumption, however, threaten its viability. This volume explores the intricacies and varieties of the conceptual relationships medieval thinkers developed among intentionality, cognition, and mental representation. Ranging from Aquinas, Scotus, Ockham, and Buridan through less-familiar writers, the collection sheds new light on the various strands that run between medieval and modern thought and bring us to a number of fundamental questions in the philosophy of mind as it is conceived today.