Altes Stadthaus

Designed by City Councilor Ludwig Hoffmann, it served as an extension to the Red City Hall from 1911 and later as the seat of the GDR Ministerial Council.
After reunification, it was proposed to the Federal Chancellor, Helmut Kohl, as Federal Chancellery, which the Federal Chancellery refused, and now serves the interior senator.

The Altes Stadthaus is the name of a representative administration building in Berlin's Mitte district, which the city government of Berlin had built between 1902 and 1911 to relieve the pressure on the Red Town Hall.

After the Second World War, the Stadthaus building, which was less destroyed than the Red Town Hall, began to have different uses. Until 1956 it was still an administrative building for the Greater Berlin magistrate.

From 1956 until the end of the GDR, the old town house served as the official residence of the first prime minister of the GDR, Otto Grotewohl, and the last Lothar de Maizière. From 1992, two Berlin branch offices of the Bonn federal government were housed here.

A major renovation began in the mid-1990s, and the Old Town Hall returned to its original purpose as a city administration building, housing the Berlin Senate Department for the Interior ever since.

Source: de.wikipedia.org/wiki/Altes_Stadthaus_(Berlin)