World’s longest reigning monarch admitted to hospital. Martin Petty. May 27, 2025 at 8:13 AM. ... The sultan has ruled the oil-rich nation of Brunei, on the island of Borneo, since 1967.

The sultan has ruled the oil-rich nation of Brunei, on the island of Borneo, since 1967. He was once the world's richest man and remains hugely popular, despite holding a firm grip on power in the ...