The sanctuary of Athena in the city of Priene represents the rare case of an exceptionally well preserved urban sanctuary of the Hellenistic period. This book deals with three of its principal structures: the altar, the stoa, and the propylon. It examines their associated architectural members, advances new reconstructions, and investigates structural developments, as well as changing architectural designs. It also offers a comprehensive chronological analysis of the sanctuary’s building complex, including a new reconstruction of the sanctuary’s earliest phase during the Late classical period. As a result, we can now trace the dynamic process of the sanctuary’s architectural development over a period of nearly 350 years.