Title: Znachenieto na Bŭlgarii︠a︡ za razdeli︠a︡neto na iztochnoto i zapadnoto khristii︠a︡nstvo
Subjects: Schism, Eastern and Western Church, Relations, Catholic Church, Orthodox Eastern Church, Interfaith relations
People: Photius I Saint, Patriarch of Constantinople (approximately 820-approximately 891)