Portrait of Prince Baltasar Carlos; Son of the Spanish King Philip IV; at approximately 11 years of age; Portrait of Prince Balthasar Carlos; son of the Spanish king Philips IV; at about the age of eleven. Standing; full-length in armor; commado staff in the right hand; to the right of a chair.; Juan Bautista Mart韓ez del Mazo (attributed to); 1639 - 1645; canvas; oil paint (paint); h 148.8 cm x w 113.2 cm x t 4.6 cm d 7.4 cm