Musa I of Mali

Musa I became the ninth Mansa of the Mali Empire around 1280, inheriting control over territory that stretched across what is now Guinea, Senegal, Mauritania, the Gambia, and Mali - roughly 1.3 million square kilometers at its territorial peak. His wealth flowed from Mali's monopoly on West African gold and salt trade: the empire produced an estimated two-thirds of all gold circulating in the medieval Mediterranean, drawing from mines in Bambuk and Bure where Malians had invented their own glass-based refining process. In 1324 he set out for Mecca with an entourage so large and gift-giving so extravagant that he destabilized Cairo's gold market for years. He returned with architects and scholars, including the Andalusian poet Abu Ishaq al-Sahili, and poured resources into Timbuktu and Gao, transforming them into centers of Islamic learning anchored by projects like the Djinguereber Mosque. He died around 1337, leaving an empire at the height of its power but curiously absent from the Mandinka oral traditions that preserved his predecessors.