Matte Effects are Topnotch
I wanted to point out that this film does have use of incredible "matting" special effects before the days of CGI existed..Most notably in two important sequences..The final duel sequence in the theather where the upper balcony level appears to be filled with guest - you can see little flickers of lights that is supposed to represent people movement...The people are all painted on glass..
Also in the French national assembly sequence the entire ceiling looks like Versailles - I would bet that its also an image painted on glass...Shows MGM special effects work at their finest.