The Sasanians were the last of the ancient Persian dynasties, and the preeminent practitioners of the Zoroastrian religion. From its foundation by Ardashir I in 224 CE the Sasanian Empire was the dominant force in the region for several centuries until its last king, Yasdegerd III, was defeated by the Muslim Arabs in the 7th century. In this clear and comprehensive new book, Touraj Daryaee provides an unrivalled account of Sasanian Persia. Using new sources, he paints a vivid portrait of the empire's often neglected social history and examines the development of its political and administrative institutions. The author also explores, for the first time in an integrated book on the Sasanians, their descendants' attempts for more than a century after their defeat to establish a second state. "Sasanian Persia" is a unique examination of a period of history that still has great significance for a full understanding of modern Iran.