The European Quarter (, ) is located to the east of the Pentagon, around the Place du Luxembourg/Luxemburgplein and the Schuman roundabout, and includes the smaller Leopold Quarter (, ). The European Parliament was built near the Place du Luxembourg, on the site of the former  Station, and of which only the central building overlooking the square remains, having been replaced by the underground Brussels-Luxembourg railway station. The European Commission, housed in the Berlaymont building, is located on the Schuman roundabout, not far from the Cinquantenaire Park. Across the street stands the Justus Lipsius building and the Europa building (part of the ''Residence Palace''), serving as the seat of the European Council and the Council of the EU. In Leopold Park, the House of European History initiates visitors to the social history of the European continent. There is a visitor centre in the main European Parliament building, known as the ''Parliamentarium'', and another smaller one in the Justus Lipsius building for the European Council. It is accessible on certain days, by appointment. Many of the attractions in the European Quarter are free to visit.