As the study of later ancient philosophy has developed in recent years it has offered new insights into both the continuing vigour of the GrecoRoman philosophical tradition and the interaction of that tradition with the new cultures of Christianity and of the Arab community. This volume addresses a key figure in this interaction. Porphyry 234c.305 AD was not only the greatest pupil of Plotinus and editor of his work but also a significant philosopher in his own right. Many aspects of Porphyrys work have been reappraised in recent years in the light of renewed interest in Neoplatonism as in later ancient philosophy in general. New editions and translations of Porphyrys works have appeared enabling uptodate discussion of issues such as his loyalty to the views of Plotinus his attitude to Aristotle his relationship to the culture of his time and his afterlife in later Platonist commentators on Aristotle in the Christian fathers and in the Arabic tradition. A distinguished international group of scholars address these topics in this volume Andrew Smith Steven Strange Riccardo Chiaradonna Richard Sorabji Anne Sheppard Peter Lautner George Karamanolis Mark Edwards Gillian Clark and Peter Adamson. The papers were all given at a conference held at the Institute of Classical Studies in July 2004.