Hamburg City Hall is the seat of local government of the Free and Hanseatic City of Hamburg, Germany. It is the seat of the government of Hamburg and as such, the seat of one of Germany's 16 state parliaments. The Rathaus is located in the Altstadt quarter in the city center, at the Rathausmarkt square, and near the lake Binnenalster and the central station. Constructed from 1886 to 1897, the city hall still houses its original governmental functions with the office of the First Mayor of Hamburg and the meeting rooms for the Parliament and the Senate.