Die Kirchen der alten Christenheit - Andresen, Carl. (Stuttgart : W. Kohlhammer, 1971)
Keywords: Church history -- Primitive and early church; historia; kirkkohistoria; kristinusko; ortodoksinen kirkko; roomalaiskatolinen kirkko; historia; kyrkohistoria; kristendom; ortodoxa kyrkan; romersk-katolska kyrkan; Bysantti; Bysans; 30-600