Roman Empire; Eusebius, of Caesarea, Bishop of Caesarea, ca. 260- ca. 340; Persecution; Churches; Jerusalem; Alexandria (Egypt); Fayyūm (Egypt); Patriarchs and patriarchate; Christianity
Priests; Greek language; Titles of honor and nobility; Coptic language; Monks; Monks-Titles; Churches; Historia monachorum in Aegypto; Pachomius, Saint; Abbots; Arabic language