biggest palace in the world
The world's largest palace by floor space is the Palace of the Parliament in Bucharest, Romania, which was built by communist dictator Nicolae Ceausescu in 1986.
The Potala Palace in Lhasa, Tibet, with 1000 rooms on 13 levels, and over 130,000 square meters of floor space, is one of the largest palaces in the world by floor area. It was the winter residence of the Dalai Lama until 1959. (Many sources, e.g. give the area as 360,000 square meters.).