Nicene and Post-Nicene Fathers: Series II/Volume I/Church History of Eusebius/Book IV/Chapter 4

The Bishops of Rome and of Alexandria under the Same Emperor.

the third year of the same reign, Alexander, bishop of Rome, died after holding office ten years. His successor was Xystus. About the same time Primus, bishop of Alexandria, died in the twelfth year of his episcopate, and was succeeded by Justus.