Columbia subject headings:
Harvard subject headings:
Church history--Primitive and early church, ca. 30-600
Church history--Primitive and early church, ca. 30-600.
Council of Nicaea (1st : 325 : Nicaea, Turkey)
Council of Nicaea (1st : 325)
Princeton subject headings:
Church history--Primitive and early church, ca. 30-600.
Council of Nicaea (1st : 325 : Nicaea, Turkey)