Longest reigning world leaders

Do you know these longest reigning monarchs and longest serving rulers?

The first answer is not verified, and speculated and/or disputed by some archaeologists.

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Last updated: September 21, 2016

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Rank	Rule	Reign	Answer
Candidate for the longest reigning leader of all time	Pharaoh of Ancient Egypt	94 years	Pepi II Neferkare
Longest verifiable reigning monarch	King of Swaziland	82 years	Sobhuza II
Longest reigning monarch currently reigning	King of Thailand	69 years	Bhumibol Adulyadej
Longest ruling non-royal leader	Maximum leader of Cuba	52 years	Fidel Castro
Longest ruling non-royal leader currently ruling	President of Cameroon	40 years	Paul Biya
Longest reigning British monarch		64 years	Elizabeth II
Longest serving British prime minister		20 years	Sir Robert Walpole
Longest serving US president		4,422 days	Franklin D. Roosevelt
Longest reigning Roman Emperor		48 years	Theodosius II
Longest reigning pope		31 years	Pius IX
Longest reigning Malietoa of Samoa		45 years	Tanumafili II
Longest reigning Chinese emperor	Qing dynasty	61 years	Kangxi
Longest reigning sultan of the Ottoman empire		46 years	Suleiman the Magnificent