18-22 S. 3rd St, Harrisburg, Pennsylvania. County/parish: Dauphin.
Added to the National Register of Historic Places September 07, 1979. NRIS 79002217.
1 contributing building.
The Keystone Building is a historic, American commercial building that is located in Harrisburg, Dauphin County, Pennsylvania.
It was added to the National Register of Historic Places in 1979.
(read more...)National Park Service documentation: https://catalog.archives.gov/id/71995781