Luca Giordano decorated the Ambassadors' Hall located in the Palace of Pleasant Retreat, which was incorporated into this institution. Rembrandt's Artemisia and Roger van der Weyden's The Descent from the Cross are among the "15 masterpieces" of this institution, which also 
Luca Giordano decorated the Ambassadors' Hall located in the Palace of Pleasant Retreat, which was incorporated into this institution. Rembrandt's Artemisia and Roger van der Weyden's The Descent from the Cross are among the "15 masterpieces" of this institution, which also houses many works painted in the "Deaf Man's Villa" and a work showing the ladies-in-waiting to the infanta Margarita. For 10 points, identify this institution, home to such paintings as Third of May 1808, and may other works by Goya and Velazquez, a museum in Madrid.
Luca Giordano decorated the Ambassadors' Hall located in the Palace of Pleasant Retreat, which was incorporated into this institution.
The {Prado} [or Museo Nacional del {Prado}; accept “{Palace} of {Pleasant Retreat}” or “{Casón del buen retiro}” until “{Palace} of {Pleasant Retreat}”]