The Commonwealth of Pennsylvania is a state located in the Middle Atlantic region of the United States of America. One of Pennsylvania's nicknames is the Quaker State; in colonial times, it was known officially as the Quaker Province, in recognition of Quaker William Penn's First Frame of Government constitution for Pennsylvania that guaranteed liberty of conscience. Penn knew of the hostility Quakers faced when they opposed rituals, oaths, violence, and ostentatious frippery.