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.
Alexander Soloviev (revolutionary)
On the morning of 20 April 1879, Alexander II was briskly walking towards the Square of the Guards Staff and faced Soloviev. Having seen a menacing revolver in his hands, the Tsar fled. Soloviev fired five times but missed, and was sentenced to death. Soloviev was hanged on 28 May 1879 (in Julian calendar; June 9, 1879 in Gregorian calendar). Soloviev had acted on his own, but other revolutionaries were keen to murder Alexander, and there were several assassination attempts following this.