Merton is an ancient parish which was first in Surrey but since 1965 (as Merton Priory [current parish]) has been in London, bounded by Wimbledon to the north, Mitcham to the east, Morden, Cheam and Cuddington (Worcester Park and rest of Motspur Park) to the south and (New) Malden to the west. The 1871 Ordnance Survey map records its area as 1,764.7 acres (7.1 km2) (2.7 sq mi). The parish was and is centred on the 12th-century parish church, St Mary's in Merton Park.