Istana Nurul Iman

The Istana Nurul Iman palace is the official residence of the Sultan of Brunei located on the banks of the Brunei River. It is the largest residential palace in the world and indeed the world's largest residence. The palace contains 1,788 rooms, 257 bathrooms, and floorspace measuring 2,152,782 sq. ft (200,000 sq m). The palace is not open to the public except on the annual Islamic celebration of Hari Raya Aidilfitri.

Source: Guiness World Records, Royal Brunei Airlines