40.498187, -80.020420 (approximate original location)
Formerly Fort Duquesne
Formerly Fort Pitt
1756? (Pittsburgh became a city in 1816)
Unknown. Missing. There were most likely multiple Keystone Markers around Pittsburgh at one time. This intersection was realigned when I-279 was constructed in the late 1980s.
April 27, 1931 photo by Pittsburgh City Photographer
Enlarged image of marker
US 19 Perrysville Avenue and Ivory Avenue