Columbia subject headings:
Emperors--Rome--Congresses.
Roman law--History--Congresses.
Rome--Politics and government--30 B.C.-476 A.D.--Congresses.
Harvard subject headings:
Emperors--Rome--Congresses.
Roman law--History--Congresses.
Rome--Politics and government--30 B.C.-476 A.D--Congresses.
Princeton subject headings:
Emperors--Rome--Congresses.
Roman law--History--Congresses.
Rome--Politics and government--30 B.C.-476 A.D--Congresses.