From Athelstan, who held off the Viking invaders of Britain, to Sobhuza, the longest-serving king of Eswatni (formerly Swaziland), here are 25 of the world's longest-serving monarchs.
The Silk Road: 8 goods traded along the ancient network vestnikkavkaza.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from vestnikkavkaza.net Daily Mail and Mail on Sunday newspapers.