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For a few blocks on Chestnut Street in Pittsburgh’s East Allegheny neighborhood, two sets of trolley tracks peek out from the red brick road.
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In 1859, Pittsburgh was the 17th largest city in the United States, housed nearly 1,000 factories and was a major industrial force. The town of about 50,000 was in the middle of earning its nickname, the Steel City, producing large amounts of the strong material and growing each year.