[@Kenshi]
[quote=@Mae]I don't have a sanctum map yet but I can certainly make one, particularly now there is a secret tunnel leading into it.[/quote]

heads up the Sanctum will always be on the lowest floor of the Dungeon, so Floor 2 in this case. The sanctum's main entrance is the stairs at the very south of the map currently, though denizens can go down the secret tunnel to reach it too. Bear in mind Adventurers could suss you out though if you use it in front of them blatantly, or if they have a skill that lets them find secret doors or something.