Andover Historical Society 97 Main St, Andover, MA01810 The Andover Historical Society is located downtown in the Amos Blanchard historical house and barn. It has a museum, a…More library and hosts various educational programs throughout the year. Guided tours of the home and barn are given from Wednesday through Saturday each week. The research library is open Tuesday through Saturday during the afternoon. This location is also home to the Andover Farmer's Market, which is held here each Saturday from the end of June until October.