The Roman Catholic Diocese of Clifton is a Roman Catholic diocese centred at the Cathedral Church of Saints Peter and Paul in Clifton, England. The diocese covers the City and County of Bristol and the ceremonial counties of Gloucestershire, Somerset, and Wiltshire, an area of 4,215 square miles (10,920 km2). Thus it stretches from Stow on the Wold in the north to Minehead and Watchet in the South. The most north-westerly parishes are in the Forest of Dean, while Marlborough near Swindon is one of the most easterly. The City of Bristol, of which Clifton is a suburb, is the largest centre of population within the Diocese; Swindon is the next biggest. Other well-known cities and towns include Bath, Wells, Cheltenham, Gloucester, Salisbury, Taunton and Weston-super-Mare. The Clifton Diocese makes up part of the Catholic Association Pilgrimage. The diocese was erected in 1850; from then until 1911 it was in the ecclesiastical province of Westminster, and has been in the province of Birmingham since then. From Wikipedia