William Penn (October 14, 1644 - July 30, 1718) was an English real estate entrepreneur, philosopher, and founder of Pennsylvania. He was an early champion of democracy and religious freedom, notable for his good relations and successful treaties with the Lenape Indians. Under his direction, the city of Philadelphia was planned and developed. As one of the earlier supporters of colonial unification, Penn wrote and urged for a Union of all the English colonies in what was to become the United States of America. The democratic principles that he set forth in the Pennsylvania Frame of Government served as an inspiration for the United States Constitution. Tamanend (1625 - 1701) was a chief of one of the clans that made up the Lenni-Lenape nation in the Delaware Valley at the time Philadelphia was established. He is best known as a lover of peace and friendship who played a prominent role in the establishment of peaceful relations among the Native American tribes and the English settlers who established Pennsylvania, led by William Penn. Penn's treaty with the Indians, 1682, painted by Benjamin West.