Buen Retiro Palace in Madrid was a large palace complex designed by the architect Alonso Carbonell and built on the orders of Philip IV of Spain as a secondary residence and place of recreation. It was built in what was then the eastern limits of the city of Madrid. Today, what little remains of its buildings and gardens forms the Retiro Park.

Philip IV, also called the Planet King, was King of Spain from 1621 to his death and King of Portugal from 1621 to 1640. Philip is remembered for his patronage of the arts, including such artists as Diego Velázquez, and his rule over Spain during the Thirty Years' War.