I've mentioned the Lord Mayor's Chapel before when wandering the area behind it, where the Gaunts Hospital used to stand. Now known as either the Lord Mayor's Chapel or St Mark's Church, it was formerly (i.e. before 1722!) known as Gaunt's Chapel. It was built around 1230, and named after Maurice de Gaunt, who founded both the Gaunt's Hospital and this, its attached chapel.
GPS Coordinates:
51.45276, -2.60050
Location: City Centre