Columbia subject headings:
Church history--Primitive and early church, ca. 30-600--Dictionaries.
Harvard subject headings:
Christian antiquities--Dictionaries.
Christian art and symbolism--To 500--Dictionaries.
Church history--Primitive and early church, ca. 30-600--Dictionaries.
Princeton subject headings:
Church history--Primitive and early church, ca. 30-600--Dictionaries.