Nicholas II of Russia
On 1 March 1881, following the assassination of his grandfather, Tsar Alexander II, Nicholas became heir apparent upon his father's ascension as Alexander III. Nicholas and his other family members bore witness to Alexander II's death, having been present at the Winter Palace in Saint Petersburg, where he was brought after the attack. For security reasons, the new tsar and his family relocated their primary residence to the Gatchina Palace outside the city, only entering the capital for various ceremonial functions. On such occasions, Alexander III and his family occupied the nearby Anichkov Palace.
Yakov Yurovsky
On the night of 16/17 July 1918, a squad of Bolshevik secret police (Cheka), led by Yurovsky, executed Russia's last Emperor, Nicholas II, along with his wife Alexandra, their four daughters–Olga, Tatiana, Maria, and Anastasia–and son Alexei. Along with the family, four members of the imperial household (court physician Eugene Botkin, chambermaid Anna Demidova, cook Ivan Kharitonov and footman Alexei Trupp) were also killed. All were shot in a half-cellar room (measured to be 25 feet x 21 feet) of the Ipatiev House in Yekaterinburg, a city in the Ural Mountains region, where they were being held prisoner. The firing squad comprised three local Bolsheviks and seven soldiers. It has been documented that the order to assassinate the Imperial family came from Yakov Sverdlov in Moscow and had been initiated by Lenin himself. It is also well documented that Yurovsky had visited the Bolshevik leadership in Moscow, and notably Sverdlov, only a few weeks before the killing took place.