The parish with its parish church(es) is the basic territorial unit of the Church of England. The parish has its roots in the Catholic Church and survived the English Reformation largely untouched. Each is within one of 42 dioceses: divided between the thirty of the Province of Canterbury and the twelve of that of York. There are around 12,500 Church of England parishes. Historically, in England and Wales, the parish was the principal unit of local administration for both church and civil purposes; that changed in the 19th century when separate civil parishes were established. Many Church of England parishes still align, fully or in part, with civil parishes boundaries.