Question: who is the longest reigning monarch in world history
Answer: Rank Name State Reign Duration From To ( days ) ( years , days ) Sobhuza II Swaziland 000000001899 - 12 - 10 - 0000 10 December 1899 000000001982 - 08 - 21 - 0000 21 August 1982 30,204 7004302040000000000 ♠ 82 years , 254 days Bernhard VII Lippe ( HRE ) 000000001429 - 08 - 12 - 0000 12 August 1429 000000001511 - 04 - 02 - 0000 2 April 1511 29,818 7004298180000000000 ♠ 81 years , 234 days William IV Henneberg - Schleusingen ( HRE ) 000000001480 - 05 - 26 - 0000 26 May 1480 000000001559 - 01 - 24 - 0000 24 January 1559 28,731 7004287310000000000 ♠ 78 years , 243 days Karansinhji Lakh