The Palace of Mafra, also known as the Palace-Convent of Mafra and the Royal Building of Mafra, is a monumental Baroque and Neoclassical palace-monastery located in Mafra, Portugal, some 28 kilometres from Lisbon. Construction began in 1717 under King John V of Portugal and was completely concluded in 1755. The palace was classified as a National Monument in 1910 and was also a finalist in the Seven Wonders of Portugal.