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3 entries match your criteria.  

 
 

Historical Markers in Forest Hills, Pennsylvania

 
Clickable Map of Allegheny County, Pennsylvania and Immediately Adjacent Jurisdictions image/svg+xml 2019-10-06 U.S. Census Bureau, Abe.suleiman; Lokal_Profil; HMdb.org; J.J.Prats/dc:title> https://commons.wikimedia.org/wiki/File:Usa_counties_large.svg Allegheny County, PA (547) Armstrong County, PA (23) Beaver County, PA (216) Butler County, PA (51) Washington County, PA (316) Westmoreland County, PA (133)  AlleghenyCounty(547) Allegheny County (547)  ArmstrongCounty(23) Armstrong County (23)  BeaverCounty(216) Beaver County (216)  ButlerCounty(51) Butler County (51)  WashingtonCounty(316) Washington County (316)  WestmorelandCounty(133) Westmoreland County (133)
Pittsburgh is the county seat for Allegheny County
Forest Hills is in Allegheny County
      Allegheny County (547)  
ADJACENT TO ALLEGHENY COUNTY
      Armstrong County (23)  
      Beaver County (216)  
      Butler County (51)  
      Washington County (316)  
      Westmoreland County (133)  
 
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1Pennsylvania (Allegheny County), Forest Hills — Pioneer Short-Wave Station
On this site in 1923, Westinghouse opened a special radio facility to experiment with long-distance transmissions. Led by Frank Conrad, engineers here demonstrated the vital role of high-frequency short waves in sending broadcasts around the world.Map (db m40901) HM
2Pennsylvania (Allegheny County), Forest Hills — Pittsburgh
Gateway to the West and steel center of the world. Named for William Pitt by General Forbes after the fall of French Fort Duquesne in 1758. Laid out as a town by John Campbell in 1764. Incorporated as a city, 1816.Map (db m75099) HM
3Pennsylvania (Allegheny County), Forest Hills — Westinghouse Atom Smasher
The world’s 1st industrial Van de Graaff generator was created by Westinghouse Research Labs in 1937 as an early experiment with atomic energy. The 5-story pear-shaped structure is located here. The company remained active in establishing US . . . Map (db m47038) HM
 
 
  
  
 
 
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Sep. 30, 2022