The 10 richest men of all time

• Mansa Musa (1280-1337, king of the Mali empire) wealth incomprehensible
• Augustus Caesar (63 BC-14 AD, Roman emperor) $4.6tn (£3.5tn)
• Zhao Xu (1048-1085, emperor Shenzong of Song in China) wealth incalculable
• Akbar I (1542-1605, emperor of India’s Mughal dynasty) wealth incalculable
• Andrew Carnegie (1835-1919, Scottish-American industrialist) $372bn
• John D Rockefeller (1839-1937) American business magnate) $341bn
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• Nikolai Alexandrovich Romanov (1868-1918, Tsar of Russia) $300bn
• Mir Osman Ali Khan ( 1886-1967, Indian royal) $230bn
• William The Conqueror (1028-1087) $229.5bn
• Muammar Gaddafi (1942-2011, long-time ruler of Libya) $200bn

Source: Money.com, Celebrity Net Worth