Columbia subject headings:
Harvard subject headings:
Condottieri--Biography.
Federico, da Montefeltro, Duke of Urbino, 1422-1482.
Italy--History--1268-1492.
Urbino (Italy)--History.
Urbino (Italy)--Kings and rulers--Biography.
Princeton subject headings:
Federico, da Montefeltro, Duke of Urbino, 1422-1482.
Urbino (Italy)--Kings and rulers--Biography.