William of Ockham (ca. 1287-1347) is one of the most prominent figures in medieval philosophy. He is famous as a logician and for his reductionist approach in metaphysics that earned him the label "nominalist." But there are many other areas of philosophy to which Ockham has made interesting contributions too: epistemology, the philosophy of mind, political philosophy, and ethics. This seminar is an introduction to and overview of Ockham's philosophy; since that will involve some discussion of other high medieval philosophers, the course can serve as an introduction to medieval philosophy.