The Einsteinhaus is a museum and a former residence of Albert Einstein. It is located on Kramgasse No. 49 in Bern, Switzerland. A flat on the second floor of the house was occupied by Einstein, his wife Mileva Marić, and their son Hans Einstein from 1903 to 1905. The Annus Mirabilis papers, which presented Einstein's theory of relativity and contributed substantially to the foundation of modern physics, were written here and published in the Annalen der Physik. During this time Einstein worked at the Federal Institute of Intellectual Property.