The Demopolis Public Square is one of the oldest in Alabama dating back to ca. 1819. The park was added to the National Register of Historic Places (NRHP) on October 29, 1975. One of the features of the park is the Park Gazebo, also referred to as the summer house. It was built circa 1886 to cover the town well which was located further west on the Square.
Sources: 1) NRHP “Public Square” Nomination Form; 2) “Demopolis, Alabama Walking Tour” by The Demopolis Area Chamber of Commerce.