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Although the senatus consultum cited and the specific office are of doubtful authenticity, the high reputation Valerian possessed in the Senate and his association with the government under Decius probably are truthful aspects of the story.
Valerian tried to negotiate a peace with the Persian king, Sapor, but was captured by treachery and taken into captivity.
The ultimate humiliation of a Roman emperor by a foreign leader was enacted through Sapor's use of Valerian as a human stepping-stool to assist the Persian king in mounting his horse and Valerian's body was later skinned to produce a lasting trophy of Roman submission.