Pennsylvania is one of the original 13 colonies that became states. The 13 stripes on our flag represents these 13 original states.

It is considered the Birthplace of Independence.

Philadelphia, the City of Brotherly Love, is where the Declaration of Independence was signed in what is now called Independence hall and where the Liberty Bell hangs (it has been replaced a couple times due to damage - natural and not).

It sits just above the dividing line between the North and south. The Battle of Gettysburg that was a turning point in the American Civil War between the North and South was located in Pennsylvania. With 6 of the original 13 colonies above it and 6 below, it is referred to as the Keystone State (like an archway Keystone in architecture). This is part of the USA's masonic heritage with famous mason embedded in its history such as William Penn, Benjamin Franklin, and a majority of those who signed the Declaration of Independence and ratified the US Constitution.