After the death of Thai King Bhumibol Adulyadej in 2016, he's considered the wealthiest monarch in the world.
Became the 29th and current Sultan and Yang di-Pertuan of Brunei, and the Prime Minister of Brunei after his father abdicated on October 5, 1967, and is one of the last absolute monarchs in the world.
Remains married to his first wife (and first cousin), despite marrying and divorcing two other women during their marriage.