The Brownington Village Historic District was added to the United States National Register of Historic Places on June 9, 1973. The district consists of seven buildings within the Old Stone House Museum complex as well as the Brownington Congregational Church and one neighboring house, the former Rice and Going Hotel, all dating from the early 19th century. It also includes the observatory on Prospect Hill erected for William Barstow Strong in 1898. This was recreated by the Brownington Grange in 1975 for the national bicentennial. It was rebuilt again in 1998.