Hammack Building. The Hammack Building is located on property once owned by John Chrisman, who helped survey the town of Gatesville in 1854. The building was constructed by W. W. Hammack (1860-1913) in the late 1800s. Over the years, the Hammack family leased the structure, which has housed the Gatesville National Bank, a saloon, a drugstore, and other commercial establishments. The Italianate style building features elaborate brickwork. #2352