In the 1930s, project buildings, or federally subsidized housing similar to those in New York City were developed between Brunswick Avenue and Perry Street. The area around the Trenton Battle Monument, the heart of North Trenton, still retains blocks of once-fashionable row-houses built in the Queen Anne and Edwardian styles. The Trenton Orthopedic Hospital, which still stands at the corner of Brunswick and Cavell Avenues, was built in the 1920s and is a superb example of Art Deco style. The hospital served as an important polio treatment center in the 1930s, 40s, and 50s, and continued to operate as such until it was closed in 1970. Many of the buildings in the Battle Monument area were abandoned in the 1960s, and eventually torn down.