Pope Hormisdas

Pope Hormisdas (; c. 450 – 6 August 523) was the bishop of Rome from 20 July 514 to his death on 6 August 523. His papacy was dominated by the Acacian schism, started in 484 by Acacius of Constantinople's efforts to placate the non-Chalcedonians. His efforts to resolve this schism were successful, and on 28 March 519, the reunion between Constantinople and Rome was ratified in the cathedral of Constantinople before a large crowd.

Source: Wikipedia — https://en.wikipedia.org/wiki/Pope_Hormisdas