Dressed in a pinstriped navy-blue suit, Charles greeted the Sultan of Brunei, Darussalam Hassanal Bolkiah, who is the world’s ...

On the other hand, Darussalam Hassanal Bolkiah, 76, went for a black two-piece suit with a purple tie and a pocket square.

King Charles has held an audience with the Sultan of Brunei, the world's longest-reigning monarch, at Buckingham Palace today ...

Thailand's King Maha Vajiralongkorn is currently the world's richest monarch. Find out his net worth and the sources of his ...