Conversation so far:
What historical references does Hugo have?
The backstory and primary features of Georges Méliès' life as depicted in Hugo are largely accurate
What else is shown in Hugo?
The father of Gypsy jazz guitar, Django Reinhardt, the Spanish surrealist painter, Salvador Dalí, and the Irish writer James Joyce, respectively.
What years does Hugo reference?
1917

Question: Are there any other historical references that are mentioned?
Self-contained rewrite: Are there any other historical references that are mentioned in Hugo?