Saint Maximian was a plain man and he preferred to live far from worldly vanity. Because of his pure and virtuous life, Patriarch Sisinius of Constantinople (426-427) ordained him presbyter. When the heretic Nestorius (428-431) was deposed as Patriarch of Constantinople, Saint Maximian replaced him on the patriarchal throne on October 25, 431, during the reign of the holy emperor Theodosius the Younger (408-450).
The holy Patriarch Maximian died peacefully on April 12, 434, on Great and Holy Thursday.