El bufón el Primo (The Portrait of Sebastián de Morra) (1645), Diego Velázquez. Spanish oil on canvas. Museo Nacional del Prado, Madrid, P01202. A court dwarf and jester at the court of Philip IV of Spain.
Juan de Pareja (detail) by Velasquez. De Pareja was a slave who became Velazquez's highly-valued assistant. After his return from Rome in 1653 Velazquez granted de Pareja his freedom. One wonders how many other slaves were not so lucky.