The Palace of Mafra (Portuguese: Palácio de Mafra), also known as the Palace-Convent of Mafra and the Royal Building of Mafra (Real Edifício de 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.