Michael I of Romania circa 1947.

Michael I (Romanian: Mihai I; 25 October, 1921 - 5 December, 2017) was the King of Romania and Prince of Hohenzollern, having ruled from 20 July, 1927 to 8 June, 1930, and again from 6 September, 1940 to 5 December, 2017. He was succeeded upon his death by his eldest daughter, Margareta.

A great-great-grandson of Queen Victoria through both of his parents, and a third cousin of Queen Elizabeth II, he was one of the last surviving monarchs from the Interbellum (along with King Rama VIII of Thailand) and the oldest of five surviving heads of state from World War II, the others being Rama VIII, Elizabeth II, the former King Simeon II of Bulgaria, and Tenzin Gyatso, 14th Dalai Lama of Tibet.

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