Westminster Abbey

Westminster Abbey (ウェストミンスター寺院), formally known as the Collegiate Church of St Peter at Westminster, is a large gothic church located in Westminster, London. It is traditionally the place where British monarchs are crowned and buried.

In Toaru Majutsu no Index, the abbey is also a magical facility.

Principles
The abbey leaks a large amount of magical energy, which allows certain magicians close to it to hide their use of magic.

Background
The abbey was initially founded in the 10th century and later rebuilt by in the 11th century, with the present church being constructed in the 13th century on the orders of. Starting from and, the abbey has been the traditional location for the coronations of British Monarchs. It has also been their traditional burial site, starting from Edward the Confessor.

The remains of Samuel Liddell MacGregor Mathers, co-founder of the Golden Dawn, were also supposedly buried in the graveyard, though another corpse was actually buried in his place, with the real Mathers actually buried in the graveyard of Edinburgh Castle.

Toaru Majutsu no Index SS: Necessarius Special Admission Test
Arlands Darkstreet and his subordinates from the Dusk Waiting to Awaken used the large leakage of magical energy from the abbey to hide themselves during the cabal's theft of the Necronomicon.

Queen Elizard later visited the facility in order to use the leyline link to send information from the British Museum to the damaged Pound Economy to speed up the recovery.

Coronzon Arc
During the Crowley's Hazard invasion of the United Kingdom, Aleister Crowley sought Mathers' supposed grave in the graveyard of Westminster Abbey in order to exploit the corpse's residual link to Coronzon. After discovering that the grave was fake, Aleister, accompanied by Kamijou Touma and Accelerator, encountered the reproduced Mathers and the Golden Dawn. The abbey and its grounds sustained some damage during the initial battle and escape. After wiping out the Crowley's Hazards guided to the graveyard, Mathers sent his subordinates after Aleister's group, remaining in the graveyard with Edward Berridge until he decided he'd waited enough.