Jovian (27 June 363 - 17 February 364). Flavius Jovianus Augustus was declared emperor by his troops upon the death of Julian after Saturninius Secundus Salutius declined the purple, and immediately started to withdraw from the war with the Sassanid Empire. He made peace on quite humiliating terms, giving up most of the territory acquired during Diocletian's reign. He re-established Christianity as the favored religion in the empire. He accidentally died on his way to Constantinople, probably from carbon monoxide poisoning, when a brazier of charcoal was left burning in his bedchamber, or perhaps from a surfeit of mushrooms as some historians claim.