The Caldwell one-room schoolhouse, just north of Mercer, Pa., closed ...

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Photo by Robert K. Yosay | published: May 14, 2012

The Caldwell one-room schoolhouse, just north of Mercer, Pa., closed in 1960 but was reopened in 1962 by the Mercer County Historical Society as a museum. It was the last one-room schoolhouse in the county.



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