The Songhai Empire was a West African empire located along the Niger River in the 15th-16th centuries. It was founded by Sonni Ali in 1464 and became one of the largest empires in world history, controlling trade routes across West Africa. Under Askia Mohammed in the late 15th century, the empire prospered through trade, administering taxes, promoting education and spreading Islam. However, after Askia Mohammed's death the empire declined and was eventually conquered by Morocco in 1591. Timbuktu emerged as a major center of learning, culture and commerce during the empire's height.