The Peterstown Heritage Society will have its opening day April 23. They will have tours all afternoon and a concert featuring Tim Berg and the Kurtz Family Band at 7 p.m. Peterstown House, located at 275 N. Main Street in Waterloo, is a restored 1830s building that began as a general store, tavern and inn for stagecoach travelers on the historic Kaskaskia-Cahokia Trail.