in the thirties, long after the last Czar had become an historical footnote, and was an example of socialist realism. That's Lenin, not Alexander III! The very capable leader of the project was Nikita Krushchev who went on to help reverse the situation at Stalingrad in the fall of 1942 and even to meet Richard Nixon in a kitchen later.
The Romanov's added very little infrastructure to the country unless you count palaces. Even the train system was shabby. The subway was designed to be functional as well as to add beauty that could be appreciated by the weary traveler. Each of the original stations had a special theme and, if I remember correctly, the Komsomol station was one of the best.