Albert Einstein (German: Albert Einstein IPA: [ˈalbɐt ˈaɪ̯nʃtaɪ̯n] (inf.) [C 1], March 14, 1879, Ulm, Kingdom of Württemberg, German Empire – April 18, 1955, Princeton, New Jersey, USA) was a Swiss, German, and American theoretical physicist and public figure - humanist, one of the founders of modern theoretical physics. Laureate of the Nobel Prize in Physics in 1921.