Cyril was bishop in Jerusalem from c350-351 AD until 386 AD. His writings are an important source for the history of early Christian doctrine. This book provides full English translations, with explanatory commentary, of his most important works. The introduction covers Cyril's life; his historical and archaeological context; his theology; and contemporary doctrine and practice. This will be essential reading for students and scholars of patristics, and those studying the history of the early Church and late antiquity.