List of archbishops of Canterbury

The Archbishop of Canterbury is the "Primate of All England" (the "first bishop" of England), effectively serving as the head of the established Church of England and, symbolically, of the worldwide Anglican Communion. From the 6th century to the 16th century, the Archbishops of Canterbury were in full communion with the Bishops of Rome, the Popes. Eighteen Archbishops have been canonised by the Roman Catholic Church. During the English Reformation the English church broke away from the authority of the Pope, at first temporarily, later permanently, recognising only the English monarch as a source of superior temporal authority.
In the Middle Ages there was considerable variation in the nomination procedure of the archbishop and other bishops. At various times the nomination was made by the Canons of Canterbury Cathedral, the English monarch, or the Pope. Since the Reformation, the church is explicitly a state church and nomination is legally that of the British crown; today it is made in the name of the monarch by the Prime Minister of the United Kingdom, from a shortlist of two selected by the Crown Nominations Commission, an "ad hoc" committee.
Today the archbishop has four main roles:
Heraldry.
Much heraldry relating to Archbishops of Canterbury is displayed in 
the church of St Mary-at-Lambeth in London, near to Lambeth Palace the London seat of the Archbishops.
Assistant bishops.
Those who have assisted the diocesan archbishop have included:
Two coadjutors – called Bishop of St Martin's — to Saxon archbishops:
Lanfranc declared that appointments to that See would cease, and the Bishop of Rochester would deputise instead.
Modern assistant bishops have included: