This study seeks insights into the peoples and traditions of the Tanzanian coast, East Africa, during the 6th to 15th century through the application of archaeological survey and excavation techniques in the vicinity of the two important trading centres of Kaole and Kilwa. Six themes are covered, namely the identification of coastal settlement sites and establishment of their chronology; recognition of principal phases in settlement development; exploitation of maritime resources and economy; identification of settlement location in relationship to the physical environment of the coast; establishment of the hierarchical nature of coastal settlement; and recognition of the principal harbour and port types.