This diorama is a german gasworks. The scale of this building paper model is 1:160. It is a very beautiful papercraft scene. A gasworks or gas house is an industrial plant for the production of flammable gas. Many of these have been made redundant in the developed world by the use of natural gas, though they are still used for storage space.
You can download this diorama paper craft from here: Gasworks Diorama Free Building Paper Model Download