Mary’s reference is the Catholic nun
Catholicism is the traditions and beliefs of Catholic Churches. The core beliefs of Catholicism are found in the Nicene Creed. The Catholic Church teaches that it is the one, holy, catholic and apostolic church founded by Jesus Christ in his Great Commission, that its bishops are the successors of Christ's apostles, and that the pope is the successor to Saint Peter, upon whom primacy was conferred by Jesus Christ.
Catholics live all over the world through missions, diaspora, and conversions. Since the 20th century, the majority reside in the southern hemisphere, due to secularisation in Europe, and increased persecution in the Middle East.