
A pattern arranged like a checkerboard, alternating light and dark squares. Photo from Independence Hall National Historical Park, Philadelphia, Pennsylvania, 2017. (Gottfried & Jennings, 1985)
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A pattern arranged like a checkerboard, alternating light and dark squares. Photo from Independence Hall National Historical Park, Philadelphia, Pennsylvania, 2017. (Gottfried & Jennings, 1985)
« Back to Glossary Index