Royals, autocrats, or just plain popular? A quiz on world leader longevity

Most developed countries see a new leader every few years, but in some nations, lengthy reigns are common. How well do you know leaders with decades in charge – and which leaders may have outstayed their welcome?

1. Which of the following royals has sat on his or her throne the longest?

Clockwise from top left: Tony Gentile/Reuters; Neil Hall/Reuters; Abo Zayed/AP; Jens Norgaard Larsen/Scanpix/Reuters
(Read caption)

Carl XVI Gustaf of Sweden


Elizabeth II of Great Britain


Margrethe II of Denmark


Qaboos bin Said al Said of Oman

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