Mansa Musa was the emperor (Mansa) of Mali (an Islamic state in West Africa) from 1312 to 1337. He was the successor of Abu Bakr II. He is considered to be the richest person in history. His wealth came from gold, which he used to give away to show Mali's riches (firsthand account of Ibn Battuta, reknowned Arabic explorer). He built many mosques and spread Islam in Africa. He died in 1337 due to unknown reasons. He was succeeded by his son Maghan Musa.