Or Istana Nurul Iman Palace is the biggest, 2,152,782 square feet, and has 1,788 rooms, 257 bathrooms, and a floor area of 2,152,782 square feet (200,000 m²). Amenities include 5 swimming pools, an air conditioned stable for the Sultan’s 200 polo ponies, a 110-car garage, a banquet hall that can be expanded to accommodate up to 5,000 guests, and a mosque accommodating 1,500 people. The palace was built in 1984 at a cost of around $400 million USD and has 564 chandeliers, 51,000 light bulbs, 44 stairwells, and 18 elevators.
The palace is used for all State functions. It is both the seat of Brunei’s government and the location of the prime minister’s office. In addition to Audience and State Rooms, there is a Throne Chamber used for various occasions such as the proclamation of the Crown Prince and the annual Birthday Investiture.
the palace is only opn for the public on the festival at the end of the Muslim fasting month.
Notice also the 13 satellite dishes outside the palace.