Paul I of Russia
Paul I (; "Pavel Petrovich") ( – ) reigned as Emperor of Russia between 1796 and 1801. Officially, he was the only son of Peter III and Catherine the Great, though Catherine hinted that he was fathered by her lover Sergei Saltykov, who also had Romanov blood, being a descendant of the first Romanov tsar's sister, Tatiana Feodorovna Romanova.
Nicholas I of Russia
Nicholas died on 2 March 1855, during the Crimean War, at the Winter Palace in St. Petersburg. He caught a chill, refused medical treatment and died of pneumonia, although there were rumors he had committed suicide. He was buried in the Peter and Paul Cathedral in St. Petersburg.