Albert Einstein was born in Germany in 1879 and later became a Swiss citizen. He developed the theory of relativity and the famous equation E=mc2. He immigrated to the United States in 1933 due to his renouncement of German citizenship for political reasons. Einstein held positions at several universities and made significant contributions to physics, including his theories of relativity and work on photon theory and statistical mechanics. He received many honors for his scientific work including the Nobel Prize in Physics in 1921. Einstein spent his later years in Princeton, New Jersey, until his death in 1955.