PHILADELPHIA - The History of The Founding of Pennsylvania starts when Swedish settlers arrived in 16th century Pennsylvania. The area falls under British control in 1664, and in 1701 William Penn received a large tract of land and named it Pennsylvania. He then signs a Charter of Privileges and established a government. In 1731, Benjamin Franklin opens the first library in the United States, and the Mason-Dixon Line was agreed upon as the southern border with Maryland. In 1776, the first Continental Congress is held in Philadelphia, and in 1775, the Second Congress established the Continental Army led by George Washington. Then, in 1777, the British invaded Philadelphia and took the state.