The Senate of Berlin and the Council of Mayors meet in the Red City Hall. Here employees of the Senate Chancellery support the Governing Mayor in his work. The official receptions for state guests take place in the representation rooms. In the citizen consultation Berliner can find advice and help. The house has 247 rooms. The town hall building in the city center with its 94 meters (including flagpole) towering tower was already in imperial times as the symbol of self-confidence of the citizens of Berlin. With its red brick façade, hence commonly called "Red Town Hall", it represents a stark contrast to the other representative buildings in the city center. The city hall clock was built in the middle of the 19th Century manufactured by Mannheimer tower clock manufacturer Johann Mannhardt. The dials have a diameter of 4.75 meters. The chime will sound from 6:00 to 22:00 every 15 minutes with tone C and at the full hour in tone D.