Berlin City Hall is the official residence of the mayor of Berlin. With its prominent and striking facade, it has become one of the landmarks of Berlin. Because of its red appearance, it is called "Red City Hall". The original building was medieval. From 1861 to 1869, the Berlin City Hall was built on the design of Hermann Waesemann. It has a history of more than 140 years. This Italian neo-Renaissance architecture has three courtyards, numerous circular arches and a magnificent bell tower 74 meters high in the middle. Because of the red exterior wall and the tall bell tower, the building is very striking, but due to the enclosure construction in some areas, there is no complete appearance.