Pittsburgh Plate Glass

Haldan Kirsch / 90.5 WESA

The identity of Pittsburgh is synonymous with the steel industry. The city’s largest skyscraper is the U.S. Steel Tower. Its football team is the Steelers, and to the nation, it's the Steel City.

But what about the city’s other industries? Before the rise of steel businesses in the region, western Pennsylvania was the center of glass sales in the United States.