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As one of the largest, most powerful American cities during the 18th century, it's little surprise that Philadelphia became a center of science, research, and medical innovation. F...

Founded in the 17th century by William Penn as a haven for persecuted Quakers, Philadelphia quickly became the most important city in America. By the dawn of the revolution it was ...

Few people in history have enjoyed such a symbiotic relationship with their city as Benjamin Franklin with Philadelphia. Inventor, scientist, businessman, manager, politician, phil...