The Columbia Encyclopedia, Sixth Edition. 2001-07.
Shapur I
(shäpr´) (KEY) or Sapor I (sä´pôr) (KEY) , d.272, king of Persia (24172), son and successor of Ardashir I, of the Sassanid, or Sassanian, dynasty. He was an able warrior king. Although he was defeated by the Roman emperor, Gordian III, in 242, he halted Gordians advance at Misiche in 244. Gordians successor, Philip (Philip the Arabian), concluded a peace with him guaranteeing Shapurs power in Armenia and Mesopotamia. In 260 he achieved his greatest triumph by defeating the Roman emperor Valerian at Edessaa landmark in the decline of Rome. The rise of Odenathus of Palmyra cut into Shapurs territories and even threatened Ctesiphon. Yet Shapur not only maintained Persian power in the west but also rebuilt Persian economy. He promoted a program of public works, and in later years he commissioned the translation of numerous Greek and Indian writings. He placed Mani, the founder of Manichaeism, under his protection.