Westover, Hampshire, is the ancient manor, now in Dorset, over which much of modern Bournemouth has developed. This area of land marked a historic boundary between Celtic and Saxon civilisations, which found expression as the county boundary between Hampshire to the east and Dorset to the west. Geographically detached parts of the manor may have resulted from the post-Civil War breakup of estates formerly belonging to the Lords Arundell of Wardour.