Gaspar de Guzmán, Count-Duke of Olivares (1587–1645) was a Spanish royal favourite of Philip IV and minister. As prime minister from 1621 to 1643, he over-exerted Spain in foreign affairs and unsuccessfully attempted domestic reform. His policies of committing Spain to recapture the Dutch Republic led to his major involvement in the Thirty Years War. This portrait was completed in 1634, with its composition referring to Olivares' military leadership in the service of King Philip.Painting: Diego Velázquez