"Papal Basilica of Saint Peter in the Vatican"

St. Peter's is one of the most renowned works of Italian Renaissance architecture and is the largest church in the world by interior measure. It is 720 ft long and 490 mft wide with a height of 448 ft. the nave height is 152 ft. While it is neither the mother church of the Catholic Church nor the cathedral of the Diocese of Rome (these equivalent titles being held by the Archbasilica of Saint John Lateran in Rome), St. Peter's is regarded as one of the holiest Catholic shrines. It has been described as "holding a unique position in the Christian world",  and as "the greatest of all churches of Christendom."

Catholic tradition holds that the basilica is the burial site of Saint Peter, chief among Jesus's apostles and also the first Bishop of Rome (Pope). Saint Peter's tomb is directly below the high altar of the basilica, also known as the Altar of the Confession. For this reason, many popes, cardinals and bishops have been interred at St. Peter's since the Early Christian period.