Pope sixtus iii biography of william

Pontificate: July 31, 432 to Aug. 19, 440. This pope was a Roman, the son of Xystus, and a priest at the time of his election. He was well known to (St.) augustine and seems to have sympathized with pelagius until the issuance of the Tractoria of Pope zosimus. Sixtus then abandoned Pelagius and was reminded of the limits of prudence and charity by Augustine.

Sixtus encouraged the negotiations, following the Council of ephesus (431), between cyril of alexan dria and john of antioch, who finally reached agreement regarding the two natures in Christ; the pope wrote to congratulate them (433).

During his pontificate, friendly relations between Rome, Constantinople, and Alexandria had all but liquidated the Nestorian problem, until proclus succeeded Maximian as bishop of Constantinople and attempted to impose the decisions of a Constantinopolitan council on the bishops of Illyricum. Sixtus wrote to Bp. Anastasius of Thessalonica confirming his office as papal v