Nicholas I (6 July [O.S. 25 June] 1796 – 2 March [O.S. 18 February] 1855) was Emperor of Russia, King of Congress Poland, and Grand Duke of Finland. He was the third son of Paul I and younger brother of his predecessor, Alexander I. Nicholas's reign began with the failed Decembrist revolt. He is mainly remembered in history as a reactionary whose controversial reign was marked... Wikipedia