A plan of the city of Philadelphia, situated at the junction of the Schuylkill (left) Delaware Rivers, Pennsylvania, circa 1750. Philadelphia was one of the first planned square grid pattern cities of the modern era and became a model to city planners and developers throughout North America. (Image by Hulton Archive/Getty Images
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January 21st, 2019
Viewed 18 Times - Last Visitor from Cupertino, CA on 03/24/2019 at 10:17 AM