The building at 6 Main Street in Westfield has gone through many changes over the years. It was built in 1825 as the Hampden National Bank on land provided by James Fowler, who served as the bank’s president until 1842. Originally, the building had a Federal or Greek Revival style facade with four freestanding columns supporting a large pediment. In 1853, the facade was completely altered to become an Italianate brownstone. The expanding bank moved to a new building next door in 1924. Since then, other businesses have occupied the original bank building. The building was damaged by fire in 1974. At some point, the facade on the first floor of the building was completely altered to its present appearance and the bank sign atop the building was removed.

The 1924 Hampden National Bank Building (pictured in the image above) is a Beaux Arts structure designed by Malcolm B. Harding. It was later the Third National Bank and is now a branch of Bank of America.