Revolving Cylindrical Doors

[Altrunchen]

A fun idea, but definitely a sometimes food. Doors and walls unless made by magic are always penetrable, the very point of a door is to let people through. If no one is there and you can make as much noise as you want anything short of solid metal doors tend to be breakable. For a rarely visited area that can be inconvenient as you like, that can afford large rotating stone doors but not guards for security (or which has other reasons not to want guards) I can see some use for them. I've seen several dungeons that used nested stone rings to similar effect. Your execution of them is very nice.

Thanks dude . And I agree, the true purpose of a lock is not to keep people out since anyone can penetrate a lock, but instead it is to slow down intruders.