The Peterstown House at 275 North Main Street in Waterloo stands on land that was once part of Joseph Wooley's claim on the Kaskaskia Land Grant and was obtained by Enoch Moore in 1817 through payment of four dollars in back taxes. The original portion of the house was built before the 1830s, with windows of nine panes over six dating its construction between 1815 and 1830, and Dr. Buford Pickens of Washington University School of Architecture found its weatherboard to be of pre-Civil War manufacture. Built in stages, the house served on its main floor as an inn for stagecoach travelers on the 60-mile Kaskaskia-Cahokia Trail, as well as a general store and tavern, and it was one of the many businesses of Emory Peter Rogers, known as the Merchant Prince of Waterloo. Used by travelers in the eighteenth and nineteenth centuries, the trail's only remaining stagecoach stop is this house, where original hand-hewn half-timber construction remains visible, with bricks set between the timbers for insulation and structural strength. In the later 1800s, a second story was added for a ballroom and theatre with a platform for musicians, and the building was later divided into apartments. Two log cabins in the backyard, more than a century old, served as homes for early Waterloo settlers, and a watering trough and hand pump remain outside. The house is now a museum, preserved and restored by the Peterstown Heritage Society, and on November 16, 1977, it was placed on the National Register of Historic Places by the United States Department of the Interior.