Alexander of Alexandria (died April 17, 326) was the nineteenth Patriarch of Alexandria from 313 to his death. During his patriarchate, he dealt with a number of issues relevant to the church's positions on issues facing the church. These included the dating of Easter, the actions of Meletius of Lycopolis, and the issue of Arianism among them. He was the leader of the opposition to Arianism at the First Council of Nicaea. He also is remembered for being the mentor of the man who would be his successor, Athanasius of Alexandria, who would become one of the leading Church fathers.