1. Pennsylvania's Role in the Declaration of Independence: On July 4, 1776, the Continental Congress met in Philadelphia's Independence Hall to approve the Declaration of Independence. Pennsylvania played a vital role in the creation of this document, with nine of the thirteen colonies supporting the resolution for independence.

2. The First Independence Day Celebration: On July 4, 1777, Philadelphia hosted the first Independence Day celebration with parades, fireworks, and other festivities. This tradition spread throughout the country, and today it remains an integral part of American culture.

3. The Liberty Bell: Another iconic symbol of American independence, the Liberty Bell, resides in Philadelphia. The bell, which was cast in 1752, was rung to celebrate the reading of the Declaration of Independence, and today it serves as a reminder of the country's rich history.

4. The Battle of Gettysburg: One of the most significant battles of the Civil War, the Battle of Gettysburg, took place in Pennsylvania from July 1 to July 3, 1863. The Confederate Army's defeat paved the way for the Union's eventual victory and the end of the war.

5. The Pittsburgh Bicentennial: In 1958, Pittsburgh celebrated its 200th birthday with an elaborate celebration that included exhibitions, parades, and the construction of the Three Rivers Stadium. The event brought together residents from across the state to celebrate Pennsylvania's rich history and cultural heritage.