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Currently viewing the tag: "Changes"

Soiling Patterns on a Tall Limestone Building: Changes Over Sixty Years (2000-13)

On December 31, 2000 By NCPTT

The Cathedral of Learning, 1930 (From University Archives, University of Pittsburgh)

Soiling of limestone caused by air pollution has been studied at the Cathedral of Learning on the University of Pittsburgh campus. The Cathedral was constructed in the 1930s during a period of heavy pollution in Pittsburgh, PA.

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National Center for Preservation Technology and Training
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Last Updated: July 31, 2012.
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