Arkham Asylum has been demolished or destroyed several times in its history, notably during the events of "Batman: The Last Arkham" (see below). It is also seriously damaged at the beginning of the "" storyline, when Bane uses stolen munitions to blow up the facility and release all the patients. After these events, the asylum is relocated to a large mansion known as "Mercey Mansion". At the beginning of the "No Man's Land" storyline, the asylum is closed down and all its patients discharged. In this instance, a timer was used to open the doors two minutes before the city is sealed. This is orchestrated by the administrator himself, Dr. Jeremiah Arkham, the nephew of Amadeus Arkham, who had the choice of discharging the patients or watching them all starve or kill each other. In the middle of the story, it is revealed during the "Prodigal" storyline that Batman has established a hidden base within the sub-basement of the asylum known as the "Northwest Batcave" but it was blown up by Black Mask during the "Battle for the Cowl" story arc.