History
From 1994 until March 2025, the Magnus-Haus on Kupfergraben in Berlin-Mitte served as the capital city office of the German Physical Society (DPG) and as the headquarters of the regional association Physikalische Gesellschaft zu Berlin. The building had been used by the GDR Physical Society since 1958. Built in 1760 under Frederick II as a representative town house in the Knobelsdorff style, the Magnus-Haus is closely linked to the history of physics through the work of important scientists.
In the 18th century Joseph Louis Lagrange, one of the founders of Analytical Mechanics, lived and worked there. In 1840 Professor Gustav Magnus bought the house. He set up his private physics laboratory there, and is regarded as the oldest physics institute in Germany. In 1845, the Physical Society emerged from the circle of participants in the Physical Colloquium established by Magnus.
Among the important scientists whose work is associated with Magnus are R. Clausius, E. du Bois-Reymond, J.W. Gibbs, H. Helmholtz, G. Kirchhoff, A. Kundt, G. Quinke, W. Siemens, J, Tyndall, E. Warburg, G. Wiedemann and many others.
Magnus died in 1870. His wife lived in the house until 1910. From 1911 to 1921 it was inhabited by theatre director Max Reinhardt and his family. When his wife, the actress Else Heims, who had already divorced him at this time, had to emigrate in the thirties of the 20th century and thus left the Magnus-Haus, it was used by the Friedrich-Wilhelms-University. In the post-war period, the house was first used as a Soviet remand prison and then served the Society for German-Soviet Friendship.
In 1958, on the occasion of Max Planck's 100th birthday, Lord Mayor Ebert handed over the house to the Physical Society of the GDR for permanent use. After German reunification, the increasingly dilapidated building was completely renovated by the Deutsche Physikalische Gesellschaft. This was made possible by donations from Siemens AG and the Stiftung Deutsche Klassenlotterie Berlin. Since then, the Magnus-Haus Berlin has been used as a scientific meeting centre. The rooms in the west wing on the first floor were used as offices by former German President Richard von Weizsäcker until his death in 2015. Other rooms on the ground floor were used by Atlantik-Brücke. In the course of the sale of the building by the owner, the use of the Magnus-Haus by the DPG ended in March 2025.