Switzerland

Switzerland (スイス), officially Swiss Confederation is a country located in central Europe. Switzerland is a land-locked country and shares boarders with five countries; Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east.

Background
Switzerland is recognized as permanently neutral country, with treaties stating that the country has abandoned the right to go to war, in exchange for the rest of the world helping to eliminate any threats if it is ever invaded. As such, it is also used as a place to arbitrate conflict between other countries, with being a site of such arbitration.

Divided into 26, Switzerland does not have a single unified language or official religion. Each of the cantons uses their preferred language, with some parts like using German and others using French,  and the dominant religious culture differs between them, with some siding with the Roman Catholic Church and others obstructing them. The differences between cantons allow for a useful frontline base for the Anglican Church, with being the site of one.

The World Intellectual Society (世界知的倶楽部) is located in, Switzerland. Presumably, the Zurich school of Alchemy, derived from Hermeticism, originated from Zurich.

Toaru Majutsu no Index SS: Agnese's Magic Side Work Experience
After being involved in several cases around Europe, Agnese Sanctis, Lucia and Angelene visited a bank vault in holding an Anglican remote database, in order to investigate a possible connection and unseen culprit behind those cases. Although their initial search did not yield any results, an encounter with a spy while out for lunch led them to a reference to a 'guild' in.

Toaru Majutsu no Index Light Novel Volume SS2
On the Second Friday of October, Misaka 18022 was one of the Sisters sent to Gemstone Mining research organizations around the world. She was sent to Lausanne, Switzerland, at the World Intellectual Club, to destroy the facilities and rescue the gemstone there. During her periodic progress report, she had just taken out an armed guard.