Standing on the southwest side of the fountain circle (
CA10) is Calhoun County's first brick building and one of Michigan's oldest inns. The National House was a major stagecoach stop along the Territorial Road. After 1879, the building served as a farm wagon and windmill factory, and just after the turn of the twentieth century, it was converted to apartments. The plain building exhibits the simplest elements of the Federal style. The entrance has a segmental transom and sidelights, and the windows have stone lintels and sills. Just four years after the founding of Marshall, it was built by local builders Bentley and Benedict for Andrew Mann (1784–1872). The National House Inn reopened for business in 1976.