Mansa musa gained an enormous amount of notoriety because of his

The answer is 1324 pilgrimage to Mecca .

Explanation:

Musa, Mansa (1280-1337) Mansa Musa, fourteenth-century emperor of the Mali Empire, is the medieval African ruler most known to the world outside Africa. His elaborate pilgrimage to the Muslim holy city of Mecca in 1324 introduced him to rulers in the Middle East and in Europe. He became emperor in 1307. He was the first African ruler to be widely known throughout Europe and the Middle East. Mansa Musa was the great nephew of Sundiata Keita, who was the founder of the empire. Here's what it was like to be Mansa Musa, thought to be the richest person in history. Billionaires Jeff Bezos, Bill Gates, and Warren Buffett are currently the three richest men in the world, according to Bloomberg's Billionaires Index.