New York City Hall is the seat of the government for New York City. Located in Manhattan, it was completed in 1812 and is one of the oldest city halls in the United States. The building features a distinctive architectural style known as Federal architecture, characterized by its grand columns and elegant dome. City Hall houses the offices of the Mayor of New York City and the City Council. It is surrounded by City Hall Park, which provides a green space for residents and visitors. The building is also a designated New York City Landmark and is listed on the National Register of Historic Places.