Historical Markers in
Butler County, Pennsylvania

1806 Plains Presbyterian Church Butler County Crider's Corners General Richard Butler George Edward Waddell George Washington Harmonist - Ziegler Barn Harmonist Cemetery Harmony Influenza Epidemic Victims Invention Of The Jeep KDKA "Dog House" Major George Washington Ogle Old Stone House Reverend Richard C. Christy The Roeblings To The Glory of God USS Mars AFS-1 Ships Bell William A. Smith Zelienople
Pennsylvania was the site of the deadliest nuclear accident in U.S. history. In 1979, a partial meltdown occurred at the Three Mile Island nuclear power plant in Harrisburg, Pennsylvania.
Pennsylvania random facts