The Palace of the Parliament (Romanian: Palatul Parlamentului) in Bucharest, Romania is one of the world's largest buildings. Its original name was the House of the People (Casa Poporului), but it was renamed (in the post-Communist era) first during the 1989 Revolution with the derogatory name of House of Ceauşescu and then as the Palace of the Parliament. However, to this day, most of the Romanians retain the old name and call it Casa Poporului.
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 four additional underground levels currently available and in use, with another four in different stages of completion.
It is the second largest administrative building in the world by surface area of its floors (with a floor area of 350,000 m²), just behind the Pentagon in Washington, D.C. It is 10% larger by volume than the Great Pyramid of Giza.
Since 1994, the building has housed Romania's Chamber of Deputies that had previously been housed in the Palace of the Patriarchy; the Romanian Senate joined them there in 2004, having previously been housed in the former Communist Party Central Committee building. The Palace also contains a massive array of miscellaneous conference halls, salons, etc., used for a wide variety of other purposes.
The Palace of Parliament is also open to be visited by groups of tourists, everyday.