Anglo-Catholicism, Anglican Catholicism, or Catholic Anglicanism comprises people, beliefs and practices within Anglicanism that emphasise the Catholic heritage and identity of the various Anglican churches. A minority of Anglo-Catholics, sometimes called Anglican Papalists, consider themselves under papal supremacy even though they are not in communion with the Roman Catholic Church. Such Anglo-Catholics, especially in England, often celebrate Mass according to the contemporary Roman Catholic rite and are concerned with seeking reunion with the Roman Catholic Church.