| Istana Banderung Kayangan | |
| Alternate Names: | Istana Tumasek |
| Address: | Jalan Istana Darul Hana |
| Location Town: | Tumasek, Bandar Seri Begawan, Brunei-Muara |
| Location Country: | Brunei |
| Coordinates: | 4.8769°N 114.9251°W |
| Completion Date: | 1930s |
| Renovation Date: | 1970s |
| Building Type: | Residence |
| Style: | Traditional Malay |
| Material: | Concrete and wood |
The Istana Banderung Kayangan[1] (English: Banderung Kayangan Palace) is a 20th century royal palace that served as the former residence of Omar Ali Saifuddien III, the 28th Sultan of Brunei.[2] The palace is situated in Kampong Tumasek, next to Istana Darul Hana surau and the rear entrance to Istana Nurul Iman. Another name for the palace is Istana Tumasek.[3]
The pillars are composed of concrete (cement), whereas the entire structure is constructed out of wood. This palace has a " roof," also called a "." Little yellow-painted pillars, standing tall, support the roof, which is meant to be used as a living area or rest place. This palace was once covered in bullion roof tiles. The palace underwent restoration in the 1970s, when an iron roof was installed in its place and geometric designs were used to shade the pillars. There is a that is attached to the stairway.
Prince Omar Ali Saifuddien stayed in his house Istana Banderung Kayangan, while Sultan Ahmad Tajuddin went to Istana Mahkota, which is the location of the current Istana Darul Hana.[4] The marriage ceremony on 6 September 1941, between Prince Omar Ali Saifuddien and Pengiran Anak Damit, was one of the most significant events to ever take place in this palace.[5] Pengiran Shahbandar Pengiran Anak Hashim led the traditional ceremony of sending a marriage symbol as part of the Gendang Jaga-Jaga ceremony.