14. Mafra National Palace
The Mafra National Palace is located in Mafra, Portugal. The palace served as a Franciscan monastery, was built during the reign of King John V from the year 1707 to 1750. The vast complex of the palace is among the most sumptuous Baroque buildings in Portugal and one of the biggest buildings constructed in Europe in the 18th century.
Image Credit: Almrsal