Attila The Hun was known to Romans for his brutality and a penchant for sacking and pillaging Roman cities.
Roman Emperor was a madman, a sadist, a murderer, a pervert, and a man who declared himself a living god.
A Russian ruler, Ivan used to cut off the ears of workers, torture victims with pipes, sword, and whips. He wa known for his extreme cruelty.
He built towers in Baghdad with skulls of 90,000 inhabitants, whereas in Turkey, he had 3,000 prisoners buried alive.
The England Queen, Mary I had over 300 religious dissenters burned at the stake in what are known as the Marian persecutions.
Lenin's revolution led to deaths of 8 million citizens of Russian Empire, by starvation, torture, or summary execution.
According to reports, the Nazis killed about 11 million people under Hitler's regime. (Pic: IMDB)
Between the early 1930s and his death in 1953, Joseph Stalin had more than a million of his own citizens executed.
Founder of People's Republic of China, his policies led to 40 million deaths through starvation, forced labor, executions.
Armies of Genghis Khan burned down cities, massacred their inhabitants and created chaos on the surroundings.
He ruthlessly ruled for 8 years in Uganda, during which an estimated 3,00,000 civilians were massacred.