Thomas P. Costin Jr. Post Office Building

The Thomas P. Costin Jr. Post Office Building, located at 51 Willow Street in Lynn, Massachusetts, is a historic Art Moderne structure built in 1933. This two-story granite building features a striking central entry pavilion and richly decorated interiors with marble elements. It serves as Lynn's central post office and was listed on the National Register of Historic Places in 2002. In 2018, it was renamed in honor of Thomas P. Costin Jr., the city's youngest mayor and long-serving postmaster, with a dedication ceremony held in 2019. The building's architectural significance and historical importance make it a noteworthy stop for tourists and researchers alike.