The origins of Christianity in this part of England go back at least to the 7th century, when Saint Birinus brought his mission to the West Saxons in 634. The West Saxon King Cynegils was baptised in the River Thames near the present site of Dorchester Abbey, where the original See was established. The see was transferred in 1092 to Winchester, before being absorbed into the Diocese of Lincoln, the vast extent of which covered much of central and eastern England from the River Thames to the Humber. King Henry VIII, acting now as head of the Church in England, established by Act of Parliament in 1542 six new dioceses, mostly out of the spoils of the suppressed monasteries. These six were Bristol, Chester, Gloucester, Oxford, Peterborough and Westminster. This intervention by Henry VIII saw a new see located at Osney in Oxfordshire in 1542 before finally being moved to its present location in the City of Oxford in 1546. While the city gained prosperity from the accession of thousands of students, it was never, apart from the university, again prominent in history until the seventeenth century, when it became the headquarters of the Royalist party, and again the meeting-place of Parliament. The city of Oxford showed its Hanoverian sympathies long before the university, and feeling between them ran high in consequence. The area and population of the city remained almost stationary until about 1830, but since then it has grown rapidly.
Modern bishopric
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 is also the chapel of Christ Church, Oxford. The Oxford diocese at the present day contains the greatest number of parishes of any diocese on England and also the most church buildings, of which 475 are grade 1 or 2* listed buildings. Croft is the first to reside at the new Bishop's Lodge, Kidlington; "for decades" previously, bishops had resided at Linton Road in North Oxford. Each bishop signs + Christian name Oxon:; e.g. + Steven Oxon:.