The Chamber is made of complex information arranged just so. It is not a thing, it is a conjunction. That is not to say that it is ephemeral by our standards. It exists constantly, all along its length, but if it were not a conjunction it would fill the whole universe, all the time. It obtrudes or de-occults only when the right information is arranged in the right way. Thus, a door that can be opened or closed, a room that exists only sometimes and only to those with the eyes to see. Would you like a key?