No, it's not the Tatas, Birlas or Ambanis. It's Osman Ali Khan, the last Nizam of Hyderabad. According to a recent inflation-adjusted list of the all-time richest, the Nizam, who ruled Hyderabad between 1886 and 1967, was ranked 6th with $ 236 billion (Rs. 12, 00, 00000 Crore approx.).
Mansa Musa I of Mali, the obscure 14th century African king, was named the all-time richest in history. With an inflation-adjusted wealth of $400 billion, he would have been considerably richer than the world's current richest, Carlos Slim, who ranks 22 with a relatively modest $68 billion. Mansa Musa I ruled the Malian Empire, making his fortune by exploiting his country's salt and gold production.
He is followed by the Rothschild family, whose descendants are still among the richest people globally. Mayer Amschel Rothschild's finance house accumulated a total wealth of $350 billion.
John D Rockefeller, third on the list, is the richest American ever, worth $340 billion today. In comparison, the poorest man on the list is 82-year-old Warren Buffett, whose peak net worth, before he started his charity work, was $ 64 billion.
The Celebrity Net Worth website ranks the world's 24 richest people of all time. Although the list spans 1,000 years, some aspects of wealth appear consistent throughout history; there are no women on the list, only three members are alive today, and 14 of the top 25 are American. The list uses the annual 2199.6 per cent rate of inflation to adjust historic fortunes, a formula that means $100 million in 1913 would be equal to $2.299.63 billion today.