I built the model of the chamber both to understand the space I wanted and also as a standby in case the real thing was unable to be built, however the real thing would be rather messy and covered in dust. If you look carefully at the first image and some of the others below you see a further miniaturised version of the Chamber. The full sized chamber would have this model within it creating three scales in one. The Museum of Optography now has two models, the other besides this is the MicroMuseum. The idea of a Russian doll, object within another, is an aspect to look out for in the MoO.