the Library of Saint John the Beheaded
The Library of St John the Beheaded is not technically an Athenaeum; it's a Censorium, a high-security Athenaeum.
There's a low-clearance wing which they use like an Athenaeum, but the majority of the archive is made of objects collected from Guardians and Mystagogues the world over that they carefully catalogue, make sense and lock away.

Several Conciliums around the world have petitioned, fought and lost for the return of artefacts to their home countries.

Most Censoria are small cupboards within an Athenaeum - London's is a legacy of the Empire.

Lamb & Flag - Covent Garden
Typically where an Arrow Cabal called the Stone Philosophers convene.

Hayfich
Location: 20 Nevern Square, London, UK
Depending on the need Hayfich is a sometimes midway home for Mages trying to lay roots down in London. Other times it is simply a haven to rest for those passing through to other locations. The current owner keeps Hayfich open to all orders and paths, it's locally known to essentially be a ceasefire zone. Cost of rooms is usually monetary, but those without money can offer work or favours owed in return for food and shelter.
This message was last edited by the GM at 17:22, Fri 12 May 2017.