Well-known genius Albert Einstein was one of our greatest physicists. He was born to his Jewish parents in Ulm, Germany, and spent many years in Switzerland. He became a Swiss citizen in 1901 and achieved a Doctorate of Philosophy in 1905 at Zurich University. While employed as a patent clerk, he published his first Theory of Relativity. In 1905 and 1916, he published his famous Theories of Relativity, describing the relationship between energy and mass and between time and space.