In his extensive work as a theologian and a historian, Walter H. Principe, CSB, (1922-1996) was committed to reflecting on both the present and the past. He was well-known as a historian of medieval theology and philosophy - especially through the work of Thomas Aquinas - as well as a contemporary theologian. This memorial collection addresses a fundamental feature of Principe's thought, namely his concern that the history of medieval theology and philosophy have a significant role to play in contemporary discussions. Strengthening the ties between historical study and contemporary theological and philosophical thought, this book offers much to those who teach and research in historical theology and the history of philosophy. The ten essays provide significant test cases of how modern scholars may utilise the historical record judiciously for contemporary debates. Those who are concerned with intellectual history (both medieval and modern), the history of doctrines, and Thomism, will also find this collection a useful contribution to modern scholarship.