Columbia subject headings:
Horsemanship--Rome--History.
Horses--Rome--History.
Harvard subject headings:
Horsemanship in art.
Horsemanship--Rome.
Horses in art.
Horses--Rome.
Rome--Army--Cavalry.
Sculpture, Roman--Themes, motives.
Princeton subject headings:
Horsemanship--Rome--History.
Horses--Rome--History.