Peter IV served as Greek Patriarch of Alexandria from 642 to 651. Following the

Muslim conquest of Egypt The Muslim conquest of Egypt, led by the army of 'Amr ibn al-'As, took place between 639 and 646 AD and was overseen by the Rashidun Caliphate. It ended the seven-century-long period of Roman Egypt, Roman reign over Egypt that began in 30 BC. ...

, he sought refuge in

Constantinople la, Constantinopolis ota, قسطنطينيه , alternate_name = Byzantion (earlier Greek name), Nova Roma ("New Rome"), Miklagard/Miklagarth (Old Norse), Tsargrad ( Slavic), Qustantiniya (Arabic), Basileuousa ("Queen of Cities"), Megalopolis (" ...

References

* Coptic Orthodox saints 7th-century Patriarchs of Alexandria 7th-century Christian saints {{Saint-stub