Lepsiushaus is a house museum in Potsdam, Germany. Johannes Lepsius was a German humanist, philosopher, historian, and Armenian human-rights activist. Lepsiushaus is the house where he lived from 1908 to 1926. During the Cold War, this building in East Germany was abandoned. In 1998 the Ministry of Culture in Germany started the renovation of the building with the help of some private donations. The renovated Lepsiushaus was opened to the public as a "Research Center for Genocide Studies" in May 2011.