The Lehigh Valley has a long history of producing industrial products that help make Pennsylvania and the world a stronger place. For instance, Bethlehem Steel was once the second largest producer of steel in the United States, and they were based out of Bethlehem, Pennsylvania. The old steel plant in Bethlehem has been transformed to SteelStacks , an arts and entertainment center. In Allentown, the Lehigh Valley IronPigs minor league baseball team is named after pig iron, a byproduct of smelting iron ore. However, the Lehigh Valley is also a leading producer of Portland cement. Invented in England in the first half of the 19th Century, Portland cement has a long history of its own in the Lehigh Valley borough of Coplay. Portland cement was first successfully manufactured in the United States in 1871 by David Saylor in Coplay. Also in Coplay, the first successful use of the rotary kiln for making Portland cement took place in 1889. Even today, the rotary kiln is used in mak...
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