Swahili Coast Trade Boom

Timeline

1. 1241–1245Kilwa Kisiwani · KilwaThe Sultanate of Kilwa, as the overlord port of the southern Swahili Coast, controlled Sofala's gold exports and customs duties of the southern islands; the expansion of stone structures such as the Great Mosque demonstrated the wealth and religious prestige accumulated by port elites from Indian Ocean trade.
2. 1245–1250Mombasa · MombasaNorthern ports such as Mombasa and Malindi linked with trade routes in the Ethiopian Highlands and the Great Lakes interior, forming a composite trade chain of "interior products—coastal distribution—Indian Ocean voyages"; Arabic documents and Islamic law were widely used in city-state administration.