The Papal Basilica of Saint Peter (Latin: Basilica Sancti Petri), officially known in Italian as Basilica Papale di San Pietro in Vaticano and commonly known as St. Peter’s Basilica, is a Late Renaissance church located within the Vatican City. St. Peter’s Basilica has the largest interior of any Christian church in the world. It is regarded as one of the holiest Catholic sites. It has been described as “holding a unique position in the Christian world” and as “the greatest of all churches of Christendom”. St. Peter’s is famous as a place of pilgrimage, for its liturgical functions and for its historical associations. It is associated with the papacy, with the Counter-reformation and with numerous artists, most significantly Michelangelo. As a work of architecture, it is regarded as the greatest building of its age.