fall of Koush southern Egypt and the prosperity of the politically multicultural Abbasid period in the continent had created several streams of migration, moving west in the mid-9th Sub-Sahara. According to Adelabu, the popularity and influences of the Abbasid Dynasty, the second great dynasty with the rulers carrying the title of 'Caliph' fostered peaceful and prosperous search of pastures by the inter-cultured Muslims from Nile to Niger and Arab traders from Desert to Benue, echoing the conventional historical view that the conquest of North Africa by the Islamic Umayyad Caliphate between AD 647–709 effectively ended Catholicism in Africa for several centuries. Islam in Ancient Yoruba is referred to as Esin Imale, which folk etymology states it comes from the word "Mali." The earliest introduction of the religion to that region was through Malian itinerant traders (Wangara Traders) around the 14th century. Large-scale conversion to Islam happened in the 18th-19th centuries. Yorubas came in contact with Islam around the 14th century during the reign of Mansa Kankan Musa of the Mali Empire. According to Al-Aluri, the first Mosque was built in Ọyọ-Ile in AD 1550 although, there were no Yoruba Muslims, the Mosque only served the spiritual needs of foreign Muslims living in Ọyọ. Progressively, Islam came to Yoruba land, and Muslims started building Mosques: Iwo town led, its first Mosque built in 1655 followed by Iṣẹyin, in 1760; Lagos, 1774; Ṣaki, 1790; and Oṣogbo, 1889. In time, Islam spread to other towns like Oyo (the first Oyo convert was Solagberu), Ibadan, Abẹokuta, Ijẹbu-Ode, Ikirun, and Ẹdẹ before the 19th-century Sokoto jihad. Several factors contributed to the rise of Islam in Yoruba land by mid 19th century. Before the decline of Ọyọ, several towns around it had large Muslim communities, unfortunately, when Ọyọ was destroyed, these Muslims (Yoruba and immigrants) relocated to newly formed towns and villages and became Islam protagonists. Second, there was a mass movement of people at this time into Yoruba land, many of these immigrants were Muslims who introduced Islam to their host. According to Eades, the religion "differed in attraction" and "better adapted to Yoruba social structure, because it permitted polygamy"; more influential Yorubas like (Seriki Kuku of Ijebu land) soon became Muslims with positive impact on the natives. Islam came to Lagos at about the same time like other Yoruba towns, however, it received royal support from Ọba Kosọkọ, after he came back from exile