Favorite Business Categories: Attractions, Community, and Historic Historical house built in 1812 by John Julius LeMoyne which became a passage for the underground railroad. Also, the home of the Washington County Historical Society. How to Find LeMoyne House/Historical Society 49 East Maiden Street Washington Pennsylvania, Washington, Pennsylvania No Records FoundSorry, no records were found. Please adjust your search criteria and try again. Google Map Not LoadedSorry, unable to load Google Maps API. Previous Next