The Diocese of Montreal is a diocese of the Ecclesiastical Province of Canada of the Anglican Church of Canada, in turn a province of the Anglican Communion. The diocese comprises the 21,400 square kilometres (8,300 sq mi) encompassing the City and Island of Montreal, the Laurentians, the South Shore opposite Montreal, and part of the Eastern Townships. The See city is Montreal, and the cathedral is Christ Church. The diocese maintains approximately 9,000 on its parish rolls in about seventy parishes.