The Queluz National Palace is a Portuguese 18th-century palace located at Queluz, a freguesia of the modern-day Sintra Municipality, in the Lisbon District. One of the last great Rococo buildings to be designed in Europe, the palace was conceived as a summer retreat for Dom Pedro of Braganza, later to become husband and then king consort to his own niece, Queen Maria I. The Hall of Ambassadors (Sala dos Embaixadores), sometimes called the throne room or the Hall of Mirrors, was designed by Robillon in 1757 and is one of the largest reception rooms in the palace.