Albert Einstein acquired Swiss citizenship in 1901, which he kept for the rest of his life. In 1905, he was awarded a PhD by the University of Zurich. The same year, he published four groundbreaking papers during his renowned "annus mirabilis" (miracle year) which brought him to the notice of the academic world at the age of 26. Einstein taught theoretical physics at Zurich between 1912 and 1914 before he left for Berlin, where he was elected to the Prussian Academy of Sciences. In 1933, while Einstein was visiting the United States, Adolf Hitler came to power. Because of his Jewish background,
Siegbert Einstein by the Nazis in 1938). Einstein planted a weeping willow in 1951, and the space was opened to the public. Today the space belongs to Jost Einstein, Siegbert's grandson, who is the director of the Center for Nature Conservation of Bad Buchau. After the end of the war, Siegbert married Elsa Schlittler; because she was an Aryan, Siegbert had additional privileges under the Nazis. They had two children, Rolf Einstein and Kurt Einstein, who were raised Protestant Christians. He was a distant relative of Albert Einstein. He died on December 24, 1968 at the age of 79 and was the