All Hallows-on-the-Wall is a Church of England church located in the City of London. It is situated adjacent to London Wall, the former city wall, at Broad Street. The present church was constructed by George Dance the Younger in 1767, replacing an earlier church built some time in the early 12th century on a bastion of the old Roman wall. It became renowned for its hermits, who lived in cells in the church. All Hallows escaped destruction in the Great Fire of London in 1666 due to its position under the wall, but subsequently fell into dereliction.