oil/wood, no recognizable signature, inscribed on the back in italian Battista Sforza la moglie del Principe D Urbino" - Battista Sforza wife of the duke of Urbino, the original diptych of Federico da Montefeltro with his wife Battista Sforza from 1472/73 was painted by Piero della Francesca (c.1412-1492) and is located in the Uffizi Gallery in Florence and is one of the most famous paintings of the 15th century, H 48.5 cm x W 34 cm, wooden frame 55 x 41 cm