Columbia subject headings:
Photius I, Saint, Patriarch of Constantinople, approximately 820-approximately 891. Bibliotheca.
Harvard subject headings:
Christian literature, Early--Censorship--France--17th century.
Photius I, Saint, Patriarch of Constantinople, approximately 820-approximately 891. Bibliotheca.
Princeton subject headings:
Photius I, Saint, Patriarch of Constantinople, approximately 820-approximately 891. Bibliotheca.