Rory Fox challenges the traditional understanding that Thomas Aquinas believed that God exists totally outside of time. His study investigates the work of several mid-thirteenth-century writers, including Albert the Great and Bonaventure as well as Aquinas, examining their understanding of the topological and metrical properties of time. Fox thus provides access to a wealth of material on medieval concepts of time and eternity, while using the conceptual tools of modern analytic philosophy to express his conclusions.