Top 12 world’s richest men of all time – See who is number 1: He’s African! (+Pics)

6. Mir Osman Ali Khan, $236 billion

Mir Isman Ali Khan, ruler of Hyderabad betweem 1911 and 1984, had a staggering net worth equivalent to $236 billion. He was named the richest man in the world by Time Magazine in 1937, and remains one of the wealthiest today decades after his death