Located on Spirii Hill in central Bucharest, the Palace is the world's largest civilian building with an administrative function. It is also the most expensive administrative building and heaviest building. It measures 270 m by 240 m, 86 m high, and 92 m under ground. It has 1,100 rooms and is 12 stories tall, with additional 8 underground levels. A colossal parliament building known for its ornate interior, it houses the Senate and the Chamber of Deputies, three museums and an international conference center. The National Museum of Contemporary Art, the Museum of Totalitarianism and Socialist Realism, and the Museum of the Palace are hosted inside the palace. Though named the House of the Republic (Casa Republicii) after the Romanian Revolution of 1989 it became widely known as the People's House (Casa Poporului), also known in English as the People's Palace.