Conversation so far:
What are some of the historical references in the film Hugo?
The film depicts of the Montparnasse derailment, when at 4:00 pm on 22 October 1895, the Granville–Paris Express overran the buffer stop at its Gare Montparnasse terminus

Question: What era is the film based on?
Self-contained rewrite: What era is the film Hugo based on?