Philippus Arabs was Emperor of Rome from 244 to 249 AD. Using extant sources, this volume presents the first account of this ruler from the Province of Arabia. The author deals particularly with the troubled domestic and foreign political situation, the Emperor's origins and family, and his attitude towards religion, especially Christianity. Finally, his position is developed in the changes and reforms of the 3rd century, and it is shown how much his understanding of power is guided by the Severan dynasty and Marcus Aurelius. The present volume is the first monograph on Philippus Arabs; the paucity of original sources led to little interest being shown in the Emperors from this period.