Perth Amboy City Hall is a historic municipal building and is the oldest public building in continuous use in the United States. Initially serving as a Courthouse when built in 1717, then as New Jersey's colonial and state capital, the building has undergone various remodeling and repairs. It has maintained its colonial style and architecture, which simultaneously modernizing its indoor offices to serve the needs of the local government. The Surveyor General's Office, adjacent to City Hall, was once used by the General Board of Proprietors of the Eastern Division of New Jersey. Across the street is the City Circle/Market Square, made up of trees, benches, archways, and walkways. City Circle also has a replica of the Liberty Bell and a statue of George Washington gifted in 1896. The original building was swallowed up in alterations that include a Second Empire-style tower and mansard roof.