St. Peter’s Basilica, Vatican City

Peter's Basilica is one of the four largest churches in the Vatican. The full name of this work is the Apostolic Basilica of Saint Peter.

Designed by architects Donato Bramante, Michelangelo, Carlo Maderno and Gian Lorenzo Bernini respectively, this basilica is the most famous masterpiece of Renaissance architecture and one of the largest churches in the world. While it is neither the mother church of the Roman Catholic Church nor the cathedral of the Diocese of Rome, Saint Peter's Basilica is considered one of the holiest cathedrals in Catholicism. The structure has been described as a cathedral that "holds a unique place in the Catholic world" and as "the greatest of the Catholic churches".

This cathedral is famous as a pilgrimage site and for liturgical purposes. The Pope performs a number of liturgies here every year, attracting between 15,000 and 80,000 people, gathered in the cathedral or St. Peter's Square directly in front.