The works of Philo of Alexandria, a slightly older contemporary of Jesus and Paul, constitute an essential source for the study of Judaism and the rise of Christianity. They are also of extreme importance for understanding the Greek philosophy of the time and help to explain the onset of new forms of spirituality that would dominate the following centuries. This handbook presents an account of Philo's achievements. It contains a profile of his life and times, a systematic overview of his many writings, and survey chapters of the key features of his thought, as seen from the perspectives of Judaism and Greek philosophy. The volume concludes with a section devoted to Philo's influence and significance. Composed by an international team of experts, The Cambridge Companion to Philo gives readers a sense of the state of scholarship and provides depth of vision in key areas of Philonic studies.