Mercurius becomes Pope John II, the first pope to adopt a new name upon elevation to the papacy.
Pope John II (Latin: Ioannes II; died 8 May 535), born Mercurius, was the bishop of Rome from 2 January 533 to his death. As a priest at St. Clement's Basilica, he endowed that church with gifts and commissioned stone carvings for it. Mercurius became the first pope to adopt a new Papal name upon his elevation to the office. During his pontificate, John II notably removed Bishop Contumeliosus of Riez from his office, convened a council on the readmission of Arian clergy, and approved an edict of emperor Justinian, promulgating doctrine opposed by his predecessor, Pope Hormisdas.