From a 14th century Catalan atlas, Mansa Musa holding a nugget of gold.
In the 14th century, Mansa Musa of Mali (c. 1280 – c. 1337) ruled a kingdom stretching from the Atlantic Ocean in the west to beyond the bend of the Niger River in the East. And according to a 2012 analysis, Mansa Musa was the richest person ever.
One of the Five Pillars of Islam is the Hajj pilgrimage to the Kaaba. During the Hajj, pilgrims drink from the Zamzam well. To understand why Zamzam water is so important to Muslims, a bit of religious history is in order.