Nicholas II was the last Tsar of Russia. His reign would prove to be tumultuous and would end in his abdication and the execution of his family. This would end the Romanov dynasty’s 304-year reign.
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https://www.newworldencyclopedia.org/entry/Nicholas_II_of_Russia
https://www.thoughtco.com/nicholas-ii-1779830
https://www.thoughtco.com/czar-nicholas-ii-of-russia-murder-1779216
https://www.biography.com/royalty/nicholas-ii
http://www.saint-petersburg.com/royal-family/alexander-iii/
https://en.wikipedia.org/wiki/Nicholas_II_of_Russia
https://www.rbth.com/history/332466-khodynka-tragedy-coronation
https://www.britannica.com/biography/Grigory-Yefimovich-Rasputin
https://www.biography.com/political-figure/rasputin
https://en.wikipedia.org/wiki/Grigori_Rasputin