The Church of Ireland ( ) is a Christian church in Ireland and an autonomous province of the Anglican Communion. The church is organised on an all-Ireland basis and is the second-largest Christian denomination on the island after Roman Catholicism. Like other Anglican churches, it has retained elements of pre-Reformation practice, notably its episcopal polity, while rejecting the primacy of the Bishop of Rome. Nevertheless, in theological and liturgical matters, it incorporates many principles of the Reformation, particularly those espoused during the English Reformation. The church self identifies as being both Catholic and Reformed. Within the church, differences exist between those members who are more Catholic-leaning (high church) and those who are more Protestant-leaning (low church or evangelical). For historical and cultural reasons, the Church of Ireland is generally identified as a Protestant church. The Church of Ireland is the second-largest Christian tradition in the Republic of Ireland with around 130,000 members and the third-largest in Northern Ireland, with around 260,000 members.