Columbia subject headings:
Harvard subject headings:
Artists' preparatory studies--Germany--Munich.
Horsemanship in art.
Horses in art
Lerma, Francisco Sandoval y Rojas, duque de, 1552-1625--Portraits.
Rubens, Peter Paul, 1577-1640. Portrait of the Duke of Lerma on Horseback.
Princeton subject headings:
Rubens, Peter Paul, 1577-1640.