tower is designed to house a solar observatory, to either prove or disprove Einstein’s theory of relativity and is built in 11/11/13 Potsdam, Germany. It is the first tower observatory in Europe. Mendelsohn worked with an astronomer called Erwin Finlay Freundlich, who designed it. This is Erich Mendelsohn’s most famous work and was finished in 1921. When it was finished Mendelsohn personally gave Einstein a tour of the tower, eagerly waiting for some word of Einstein’s approval, yet Einstein said nothing