Not to be confused with the former (1540–1550) or the Church of England Diocese of Westminster (Church of England) . Diocese of London
Roman Catholic Diocese of Westminster is a diocese of the  of the Latin Rite in England. The diocese consists of all of Roman Catholic Church north of the London and west of the River Thames , the borough of River Lea (in Surrey), and the county of Spelthorne , which lies immediately to London's north. Hertfordshire
The diocese is led by the
, who serves as Archbishop of Westminster of the pastor , mother church , as well as the Westminster Cathedral of the metropolitan bishop ecclesiastical . Since the Province of Westminster , each Archbishop of Westminster—including the incumbent, Cardinal re-establishment of the English Catholic dioceses in 1850 —has been created a Vincent Gerard Nichols by the cardinal in consistory, often as the only cardinal in England, but the 43rd of Pope since the 12th century. It is also customary for the Archbishop of Westminster to be elected President of the English cardinals providing a degree of a formal direction for the other English bishops and archbishops. However, he is not formally a Catholic Bishops' Conference of England and Wales , though he has special privileges conferred by the Papal Bull primate Si qua est. The  has not been granted the title of Primate of England and Wales, which is sometimes applied to him, but his position has been described as that of "chief metropolitan" of the Roman Catholic Church in England and Wales and as "similar to" that of the Archbishop of Westminster in the Church of England (as the metropolitan bishop of the Archbishop of Canterbury . Diocese of Canterbury The diocese is one of the smallest dioceses in England and Wales in geographical area, but the largest in terms of Catholic population and priests.  
suffragan of Westminster are the dioceses of Brentwood, East Anglia, Northampton, and Nottingham. sees
The diocese essentially covers the same region as the Church of England
as it was before the Diocese of London until 1850, adopting—like all other dioceses across England (created that year) English Reformation —an alternative name (originally because of the  ) but based on the centuries-old divisions of the country. Ecclesiastical Titles Act 1851 The diocese effectively survived the period of Catholic oppression in English history as a  territory established by canons accepted by Rome in 1622 as the missionary which was in public law pronounced Apostolic Vicariate of England as counter to the established church.
in England and Wales illegal
The mostly clandestine apostolic vicariate covering the country was divided so that the Apostolic Vicariate of London District formed on 30 January 1688 coinciding with a degree of freedoms. By decree of
Pope Pius IX (, this entity gained its elevation to the rank of a ) Universalis Ecclesiae (instead of archdiocese) on 29 September 1850.