A healthy correspondence of Eulogius of Alexandria with Gregory the Great of Rome is evident from the fourteen books of Gregory's letters called the Registrum. After the Arab conquest of Egypt in the 7th century – which permanently separated the region from the Byzantine Empire – the Greek Chalcedonians became an isolated minority in the region, even among Christians, and the church has remained small for centuries.
A clear correspondence between Eulogius of Alexandria and Gregory the Great of Rome is evident in the fourteen books of Gregory's letters called the Registrum. After the Arab conquest of Egypt in the 7th century – which permanently separated the region from the Byzantine Empire – Greek Chalcedonians became an isolated minority, even among Christians, and the church has remained small for centuries.