Istana Darussalam is a former royal residence of Sultan Omar Ali Saifuddien III, as well as the birthplace of Sultan Hassanal Bolkiah. It was built in the 1940s and located at Sumbiling Lama, an area on the banks of Kedayan River near the city centre. The building is made of wood and styled in traditional Malay stilt house. It has been designated as a protected monument under the Antiquities and Treasure Trove Act. The palace has also been designated as a tourist attraction, although the compound within the gate and the building is not open to public. The road that leads to the place has been named after it.