Ultra-huge building plan plan drawing which was not actually built in the former Soviet Union

It is a design of various plans made under the plan that it will be built in Moscow from the 1930s to the early 1950s.

Anyway it's great. Were you trying to make the world ahead of Soviet names, or ...?
Unrealised Moscow
http://www.muar.ru/ve/2003/moscow/index_e.htm

In fact, it is actually not built like this, although it is not huge so far with reference to the above plan.

Example 1

Example 2

Example 3

Example 4