Albert Einstein
"Einstein" redirects here. For the musicologist, see Alfred Einstein. For other people, see Einstein (surname). For other uses, see Albert Einstein (disambiguation) and Einstein (disambiguation). German-born physicist and developer of the theory of relativity Albert Einstein Albert Einstein in 1921 Born ( 1879-03-14 ) 14 March 1879 Ulm, Kingdom of Württemberg, German Empire Died 18 April 1955 (1955-04-18) (aged 76) Princeton, New Jersey, US Residence Germany, Italy, Switzerland, Austria (present-day Czech Republic), Belgium, United States Citizenship Subject of the Kingdom of Württemberg during the German Empire (1879–1896) [note 1] Stateless (1896–1901) Citizen of Switzerland (1901–1955) Austrian subject of the Austro-Hungarian Empire (1911–1912) Subject of the Kingdom of Prussia during the German Empire (1914–1918) [note 1] German citizen of the Free State of Prussia (Weimar Republic, 1918–1933) Citizen of the United States (1940...