The architects were the joint salaried surveyors to the Commission, John James and Nicholas Hawksmoor. James is thought to have been responsible for the body of the church, and Hawksmoor for the west tower, the flanking staircase wings, and the obelisk spire (a most unusual feature for an Anglican church). The spire was topped by an unusual weather vane depicting the head of a dragon with a fiery comet-like tail: this was misinterpreted locally as a louse, and by the mid-20th century had gained the church the nickname "lousy St Luke's".