On March 13, 1881, Alexander II of Russia was assassinated by members of a far-left terror group 'People's Will' who throw a bomb at him in the city of St. Petersburg. From the article:
"Czar Alexander II assassinated in St. Petersbug
Czar Alexander II, the ruler of Russia since 1855, is killed in the streets of St. Petersburg by a bomb thrown by a member of the revolutionary “People’s Will” group. The People’s Will, organized in 1879, employed terrorism and assassination in their attempt to overthrow Russia’s czarist autocracy. They murdered officials and made several attempts on the czar’s life before finally assassinating him on March 13, 1881.
As czar, Alexander did much to liberalize and modernize Russia, including the abolishment of serfdom in 1861. However, when his authority was challenged, he turned repressive, and he vehemently opposed movements for political reform. Ironically, on the very day he was killed, he signed a proclamation–the so-called Loris-Melikov constitution–that would have created two legislative commissions made up of indirectly elected representatives.
He was succeeded by his 36-year-old son, Alexander III, who rejected the Loris-Melikov constitution. Alexander II’s assassins were arrested and hanged, and the People’s Will was thoroughly suppressed. The peasant revolution advocated by the People’s Will was achieved by Vladimir Lenin’s Bolshevik revolutionaries in 1917."