Waterbury City Hall is itself a work of public art designed by Cass Gilbert and part of the Cass Gilbert National Register District on Field and Grand Streets in Waterbury.  This District is comprised of five large stone and brick structures, including City Hall, designed by Cass Gilbert in the Georgian Revival and Second Renaissance Revival architectural styles and built during the 1910s.  City Hall and the other four buildings were designated as a historic district in 1978, listed on the National Register of Historic Places, and are contributing properties to the Downtown Waterbury Historic District.