Built in 1761, Saint Peter's was the early worship house of the Quakers that populated Colonial Philadelphia. Architect Robert Smith was commissioned to erect the Georgian church in 1758. The tower, spire, and two wooden angels were additions made by other architects in the 19th century. A row of Osage trees that surround the church are said to be planted with seeds from trailblazers Lewis and Clark. One of St. Peter's most notable worshipers was George Washington. The grave sites of historical figures such as artist Charles Wilson Peale and James K. Polk's Vice-President George Mifflin Dallas are on the premises.