How did they even build this thing? The house looks like it's from the 19th century so it doesn't look like it was torn down and built again around the bunker.
Did they hollow out an old building and put a bunker in there? How did nobody notice?
How do you even build something 18 storeys deep without breaking the confines of a two storey house with your equipment?
Remember that it opens, at one point, into the subway. Its just a supposition, but I could imagine this thing being built during the construction of the subway tunnel. It would be relatively easy to disguise all the equipment going in and dirt coming out in the process.
Looking at the history of the Metro construction, the bunker construction dates to roughly the time of the 4th stage of the Metro construction. http://en.wikipedia.org/wiki/Moscow_Metro
Again, its a supposition and the address of the bunker would be needed to compare to the location of the Metro built during the 4th stage.
The timeframe is off. The bunker is in the vicinity of Taganskaya station (the one on the "ring") which was opened in 1950. The bunker was built between '58 and '63 - so not only it was built much later, it also took much longer than a typical subway construction project.
Did they hollow out an old building and put a bunker in there? How did nobody notice?
How do you even build something 18 storeys deep without breaking the confines of a two storey house with your equipment?
This thing opens up so many questions!