Columbia subject headings:
Antoninus Pius, Emperor of Rome, 86-161.
Rome--History--Antoninus Pius, 138-161.
Harvard subject headings:
Antoninus Pius, Emperor of Rome, 86-161
Emperors--Rome--Biography
Rome--History--Antoninus Pius, 138-161
Rome--Kings and rulers--Biography.
Princeton subject headings:
Antoninus Pius, Emperor of Rome, 86-161.
Rome--History--Antoninus Pius, 138-161.