Aksum was an ancient kingdom located in present-day Ethiopia and Eritrea that controlled important trade routes in East Africa from the Mediterranean to India from around 300 AD. It became a center of early Christianity in Africa but declined in the 600s when Arab traders took over the lucrative Red Sea trade routes. As Aksum declined, powerful kingdoms like Ghana, Mali, and Songhai arose in West Africa, controlling trade in gold and salt across the region. Mali's King Mansa Musa gained fame after his 1324 pilgrimage to Mecca, where he displayed Mali's wealth and helped spread Islam. Timbuktu emerged as a major trading and scholarly center under Songhai rule.