Have you ever heard of Mansa Musa? Well, he is the richest person who ever lived -- according to Celebritynetworth.com -- which adjusted its list for inflation. Mansa Musa ruled over the Malian Empire in West Africa way back in the 14th century.
His fortune would have been worth almost half a trillion dollars today.
See the full list: The 25 Richest People of All Time
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