Saint Alexander of Alexandria who cast the heretic Arius out of the Church

From the Roman Martyrology read today for tomorrow’s memorials:

At Alexandria, [in the year 326,] the glorious Elder, holy Alexander, Pope of that see, wherein he succeeded blessed Peter. He it was who cast his priest Arius out of the church when he became perverted with wicked heresy, and reprobate from the truth of God, and he was afterward one of the three hundred and eighteen fathers who condemned him in the Council of Nice.