The Church of England geographical structure uses the local parish church as its basic unit. The parish system survived the Reformation with the Anglican Church's secession from Rome remaining largely untouched, thus it shares its roots with the Catholic Church's system described above. Parishes may extend into different counties or hundreds and historically many parishes comprised extra outlying portions in addition to its principal district, usually being described as 'detached' and intermixed with the lands of other parishes. Church of England parishes nowadays all lie within one of 44 dioceses divided between the provinces of Canterbury, 30 and York, 14.