- COORDINATES: 40.08280, -75.381296
- COUNTY: Montgomery
- DISTANCE TO NEXT: Norristown - 3
- EXPLANATION OF NAME: Named For Frederick the Great of Prussia
- FOUNDED: 1786
- MANUFACTURER: Geiser Manufacturing Company
- STATUS: Marker is damaged, bottom, center portion is missing, both the sign and post are badly rusted, and the post leans toward the adjacent roadway. As of Feb. 2024 marker has been taken down for repair and refurbishment by KMT.

June 2011 photo by JGl

Photo by I.C. Liggett

December 2011 photo by C. Busch

Historic photo ca. 1976, courtesy of the King of Prussia Historical Society.

Photo by C. Busch Dec. 2011

March 2025 photo by Mike Wintermantel
South Gulph Road, (Between Long & King of Prussia Roads at Sunoco Gas Station)