> The one key fact that puts the idea to rest is all the staircases I've seen that spiral clockwise in one part of the building, and counter-clockwise in the ot

> The one key fact that puts the idea to rest is all the staircases I've seen that spiral clockwise in one part of the building, and counter-clockwise in the other. Smart! One staircase to defend from attackers coming up from the ground and another to defend from attackers coming from the roof.