Columbia subject headings:
Emperors--Rome--Portraits.
Portrait sculpture, Roman.
Trajan, Emperor of Rome, 53-117--Art.
Harvard subject headings:
Coins, Roman.
Portrait sculpture, Roman.
Trajan, Emperor of Rome, 53-117--Portraits.
Princeton subject headings:
Art.
Emperors--Rome--Portraits.
Portrait sculpture, Roman.
Portraits.
Trajan, Emperor of Rome, 53-117--Art.