Columbia subject headings:
Rome--Religion.
Rome--Social conditions.
Vittinghoff, Friedrich, 1910-
Harvard subject headings:
Rome--Religion--Congresses.
Rome--Social conditions--Congresses.
Vittinghoff, Friedrich, 1910-
Princeton subject headings:
Rome--History--Empire, 30 B.C.-476 A.D.
Rome--Religion.
Vittinghoff, Friedrich, 1910-1999.