St. Peter's Basilica

St. Peter's Basilica (聖ピエトロ大聖堂) is a basilica of the Roman Catholic Church. Found in the Vatican, it is the world's largest cathedral. and the greatest Roman Catholic stronghold.

History
Although there are many turning points in the history of the basilica the first turning point was St. Peter’s death and the building of his tomb. The basilica was established upon St. Peter's tomb, where the Croce di Pietro was set-up on the June the 29th. From then on, the location where the cross stood and several square kilometers of land and the denizens within, became the dominion of the Roman Catholic Church.

With regards to the creation of the church, since the view of the Roman Catholics is that since the place where Peter is buried, then it should not be disturbed. As such, they must do their best to maintain his heritage. Emperor Constatine paid his respects towards the Saint. and had ordered the construction of the church that is now known as the Old St. Peter's Basilica in the 4th century. During the Renaissance there was a pleasant large scale reformation of the church, to which the Old St. Peter's Basilica was replaced by the current form of the basilica, with the aid of the architectural masters of that time such as Michelangelo.

As such, the basilica became known as the largest Church in the heart of Roman Catholicism, the largest religion in the world, becoming an icon of the Vatican.

Some time before the start of the series, the church became the stronghold and base of operations of the enigmatic God's Right Seat. Moreover, Index was also sent into the basilica when visiting Vatican, the other being in the Vatican Library, most likely to read the grimoires there. In October of the current year of the Story Timeline, St. Peter's Basilica is half destroyed after a battle by Fiamma of the Right and then-current Pope, Matthai Reese. The effects destroys part of the walls of that surround the Vatican and severely weakens the defensive array that surrounds the city.

Principles
Since the Vatican's defensive power is directly related to the amount of relics that have significance to Christianity, the basilica is the greatest stronghold of Roman Catholicism, as such destroying even a small part of it, like a pillar, might cause problems with its defensive functionality.

The Pope, is empowered by the 2 billion followers and the 2,000 years history of the Church. The basilica, being the largest and highest stronghold of Roman Catholicism, and being one of the most signficant symbols of Christianity, and combined with the other parts of the Vatican, adds to the power of the Pope, like a powerful spiritual item.

Interior
The interior of the basilica is where most meetings between the Pope and the members of God's Right Seat occur. Moreover, deep within the bowels of the church is where Fiamma of the Right had apparently most of his time before his introduction. Furthermore, below the basilica is the vast library where Index was once guided to.

The tomb of St. Peter is supposedly located within the confines of the basilica.