 The area and population of the city remained almost stationary until about 1830, but since then it has grown rapidly.The modern diocese covers the counties of Oxfordshire, Berkshire, and Buckinghamshire, with parishes also in Bedfordshire, Gloucestershire, Hampshire, Hertfordshire, and Warwickshire.The see is in the City of Oxford where the seat is located at the Cathedral Church of Christ which was elevated to cathedral status in 1546, and which (uniquely among English dioceses) is also the chapel of Christ Church, Oxford.