Mansa Musa, or Musa I of Mali is considered one of the richest men in history. Musa was the tenth emperor of the Mali Empire, one of the prosperous Sahelian kingdoms that developed along the Saharan slave trade routes in the later medieval period.
By the time of his death in 1937, estimates place his net worth in the range of US$300 billion to US$400 billion in adjusted dollars for the late 2000s.