Pope Saint Sixtus II (a corruption of Greek Ξυστος, Xystus, "polished") was pope from August 30, 257 to August 6, 258, following Stephen I as bishop of Rome in 257. He died as a martyr during the persecution by Emperor Valerian.
According to the Liber Pontificalis, he was Greek by birth; however this is uncertain and disputed
His feast day in the Roman Catholic calendar of saints is August 7.