<P>Constantius II, son of Constantine the Great, ruled the Roman Empire between 337 and 361 CE. Constantius¿ reign is characterised by a series of political and cultural upheavals and is rightly viewed as a time of significant change in the history of the fourth century. Constantius initially shared power with his brothers, Constantine II and Constans, but this arrangement lasted a short period of time before Constantine II was killed in a contest over authority by Constans. Further threats to the stability of the empire arose with the usurpation of the ambitious Roman general Magnentius between 350 and 353, and additional episodes of imperial instability occurred as Constantius¿ relations with his junior Caesars, Gallus and Julian, deteriorated, the latter to the point where civil war would have been on the cards once again if Constantius had not died on 3 November 361. </P><P> </P><P>This book examines the dynastic, political and cultural impact of Constantius'' reign as a member of