Omar Ali Saifuddin I ibni Muhammad Alauddin, also known as Al-Marhum Makam Besar, was the 18th Sultan of Brunei and the second son of Sultan Muhammad Alauddin. He was regarded as one of the longest-serving sultans and was renowned for his wise leadership and just rule, merely following his father-in-law, Sultan Hussin Kamaluddin. In fact, he received helpful knowledge, counsel, and experience from his father-in-law when he was still alive during his reigning period.

Labuan, officially the Federal Territory of Labuan, is an island federal territory of Malaysia. Its territory includes Labuan Island and six smaller islands, off the coast of the state of Sabah in East Malaysia. Labuan's capital is Victoria and is best known as an offshore financial centre offering international financial and business services via Labuan IBFC since 1990 as well as being an offshore support hub for deepwater oil and gas activities in the region. It is also a tourist destination for people travelling through Sabah, nearby Bruneians and scuba divers. The name Labuan derives from the Malay word labuhan which means harbour.