Which Pennsylvania city is named as a leading city for America250 events?

Philadelphia is the Pennsylvania city named as a leading city for America250 events.

Philadelphia was the meeting place of the Second Continental Congress when it adopted the Declaration of Independence. It was also the national capital under the Articles of Confederation and the site of the Constitutional Convention in 1787, making it central to several founding-era milestones.

The semiquincentennial legislation identifies Philadelphia, Boston, New York City, and Charleston, South Carolina, as leading cities for activities in places of historical significance. Philadelphia's Independence National Historical Park is especially important to the anniversary program.

Pittsburgh and Harrisburg are also major Pennsylvania cities, but neither is the Pennsylvania leading city named in the federal semiquincentennial planning description. The distinction refers to historical importance for the national commemoration, not population size.