5. Mir Osman Ali Khan, $230 billion
Born on 6 April 1886, Mir Osman Ali Khan was the last Nizam of the Princely State of Hyderabad. The ruler died in 1967 and is now survived by his 149 children.
4. Nikolai Alexandrovich Romanov, $300 billion
The competition here onwards is intense. As personal fortune of $ 300 billion even exceeds the GDP of small nations. The last emperor of Russia, Nikolai Alexandrovich Romanov was born on 18 May 1868 and was later recognized as martyred saints.
3. Andrew Carnegie, $310 billion
Andrew Carnegie came from nothing but eventually, he not only became one of the richest American but also one of the richest person in the world.
2. John D. Rockefeller, $340 billion
Same like Carnegie, John D Rockefeller, had a humble becoming before turning standard oil into a multi-billion dollar enterprise.
1. Mansa Musa, $400 billion
Finally, we have the richest person in the history of mankind, who was Mansa Musa. The reigning emperor of the Mali empire had a jaw-dropping fortune of $ 400 billion, which is almost impossible to match up with.