Columbia subject headings:
Harvard subject headings:
Emperors--Rome--Biography--Exhibitions.
Rome--History--Trajan, 98-117--Exhibitions.
Trajan, Emperor of Rome, 53-117--Exhibitions.
Princeton subject headings:
Rome--History--Trajan, 98-117--Exhibitions.
Trajan, Emperor of Rome, 53-117--Art--Exhibitions.
Trajan, Emperor of Rome, 53-117--Monuments--Italy--Rome--Exhibitions.