The Diocese of Plymouth has 103 churches (as of 2009). The cathedral is in Plymouth and is dedicated to St Mary and St Boniface. The Diocese of Plymouth was founded on 29 September 1850. It contains the counties of Dorset, Devon and Cornwall, along with the Isles of Scilly. It is a suffragan diocese in Province of Southwark, and is subject to the Archdiocese of Southwark.