Factual error: Prime Minister Peter Stolypin is shown at the Romanov Tercentery, which marked 300 years of Romanov rule. Stolypin died in 1911, yet the Tercentenary was held in 1913. Also, Alexei's Spala incident happened in 1912, and was also shown after the Tercentenary.
Factual error: The Imperial Family was executed in July of 1918. In actuality, 11 people were killed in Ekaterinburg. These were: Nicholas, Alexandra, Olga, Tatiana, Maria, Anastasia, Alexei, Dr. Botkin, Anna (a maid), Khartinov (a servant), and Trupp (a servant). However, at the end of the film, only the 7 members of the family and Dr. Botkin are shown to be executed. I realize this film was rather lavish, but if it was intended to be a semi-documentary, all the victims should have been portrayed at the end.