In the epilogue, Hubert states that his cousin Guy later went on to fight in the Hundred Years War. This would not have been possible because the film is set in the year 1221, but the Hundred Years War took place between 1337 and 1453. Guy could not have taken part in those wars unless he lived to be over 140. In addition, the term Hundred Years War was first used by 19th century historians.
More than once Blanche is obviously wearing modern make-up.