The Anglican Communion is the third largest Christian communion after the Catholic Church and Eastern Orthodox Church. Founded in 1867 in London, the communion has more than 85 million members within the Church of England and other national and regional churches in full communion. The traditional origins of Anglican doctrine are summarised in the Thirty-nine Articles (1571). The Archbishop of Canterbury (currently Justin Welby) in England acts as a focus of unity, recognised as primus inter pares ("first among equals"), but does not exercise authority in Anglican provinces outside of the Church of England. Most, but not all, member churches of the communion are the historic national or regional Anglican churches.