ORAZIO (c. 1565—1646)  is generally named Orazio Lomi de' Gentileschi; it appears that De' Gentileschi was his correct surname, Lomi being the surname which his mother had borne during her first marriage . He was born at Pisa, and studied under his half-brother Aurelio Lomi, whom in course of time he surpassed . He afterwards went to Rome, and was associated with the landscape-painter Agostino Tasi, executing the figures for the landscape backgrounds of this artist in the Palazzo Rospigliosi, and it is said in the great hall of the Quirinal Palace, although by some authorities the figures in the last-named building are ascribed to Lanfranco . His best works are " Saints Cecilia and Valerian," in the Palazzo Borghese, Rome; " David after the death of Goliath," in the Palazzo Doria, Genoa; and some works in the royal palace, Turin, noticeable for vivid and uncommon colouring . At an advanced age Gentileschi went to England at the invitation of Charles I., and he was employed in the palace at Greenwich . Vandyck included him in his portraits of a hundred illustrious men . His works generally are strong in shadow and positive in colour . He died in England in 1646 .