City Hall located in lower Manhattan, houses the Mayor of New York along with the chambers of the New York City Council. It is considered one of the oldest city hallâ€™s in the United States and a National Historic Landmark. Construction of New Yorkâ€™s City Hall began in 1803 and was completed in 1812. The Historic Blue Room is where past and present Mayors of New York have held press conferences and bill signing ceremonies for decades. The steps outside City Hall have been the backdrop for many rallies and political demonstrations throughout the years.