The Tower of London
The Tower of London is an iconic landmark of London. It now currently houses the Crown Jewels and Waterloo Barracks. It is mostly used for tourism of the medieval castle, as far as the public is concerned. The tower has been used as an armoury, a treasury, a menagerie and the Royal Mint.
The Tower is believed to be haunted by the ghost of Anne Boleyn, Henry VI, Lady Jane Grey, Margaret Pole, the Princes in the Tower and several other ghosts including a bear.
Beneath the Tower is a large chamber. This Chamber is the seat of the Council of Mages it is hear that the council meets and gives out orders and duties for subordinate Mages. It is suspected that V has his personal Sanctum in the Tower of London. Oh and Anne is nice, the bear, not so much.