At 30 meters long and 18 meters wide, the Main Hall is the building’s largest room, with arched windows that are 6.90 meters high. It offers space for a great number of guests – both at official ceremonies, receptions, readings, concerts or signings of the Golden Book and at public events accessible to all Berliners.
Like the Main Hall, all of the Red Town Hall’s richly decorated representative rooms were rebuilt in a simpler style after World War II. Originally, the Main Hall had two stories. There was a gallery, the walls were decorated with stucco marble, and the ceilings were even higher than they are today. After reconstruction, East Berlin’s city council – the municipal parliament of East Germany’s capital city – met here until 1990.