Columbia subject headings:
Canon law--History.
Catholic Church.
Harvard subject headings:
Canon law--History.
Catholic Church--Europe.
Church history--Middle Ages, 600-1500
Church history--Modern period, 1500-
Church history--Primitive and early church, ca. 30-600
Princeton subject headings:
Canon law--History.
Church history--Middle Ages, 600-1500.
Church history--Modern period, 1500-
Church history--Primitive and early church, ca. 30-600.