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 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.

Factual error: In few scenes, you can see street signs with inscriptions in Polish, for example "Ulica Lubanski" (Lubanski's Street). In fact, because of the Polish language's plural forms, the inscription should be "Ulica Lubanskiego".