Factual error: An old man appears with children following him. This is supposed to be pedagogue Janusz Korczak. It appeared as if he was just wearing a suit and a Jewish arm band. In the Warsaw Ghetto, Mr. Korczak never wore an arm band and wore his WWI Polish Army Uniform, both as acts of defiance. He was beaten and almost put to death (he had connections) for not wearing an arm band so having one on in the movie is inaccurate.
Factual error: In a few scenes, you can see street signs with inscriptions in Polish, for example "Ulica Lubanski" (Lubanski's Street). In fact, because Polish language retained the Old Slavic case-system with seven cases for nouns, the inscription should be "Ulica Lubanskiego" ('Lubanski' is a nominative noun, and 'Lubanskiego' is a genitive/possessive case).
Factual error: In the scene where the Germans are bombing the wall, the rebels are hiding behind. You can see that the bricks which came out of the wall because of the bombing are lying on the "non-Jewish" part of the wall and not on the ghetto side as it should be.
Trivia: Adrian Brody insisted on learning to play the piano himself because he detested the idea of him being in a long shot pretending to play the instrument and then the camera showing someone else's hands on a close up shot actually playing. He said he hated that, not just for him, but on any other film that had such a scene. So he went and took lessons, practicing for hours on end.Allister Cooper, 2011
Trivia: When director Roman Polanski won the Oscar for "Best Director" during the 2003 Academy Awards ceremony, he did not attend because of his statutory rape conviction in 1977. If he returns to the United States, Polanski will be immediately arrested once he steps into American soil. On late 2003, actor Harrison Ford presented the Oscar that Polanski won in March during the Deauville Film Festival in France.megamii