Kingdom of Songhay - Leo Africanus, an Arab traveler visited Timbuktu in the Kingdom of Songhay early in the 1500s; a translation of his description. - http://www.bu.edu/africa/outreach/materials/handouts/k_o_Songhay.html
Building Style: Songhay Empire - A collection of photographs of the mosque and tomb of Askia Mohammed. - http://archnet.org/library/images/sites.tcl?key=Songhay%20Empire&collection_id=23&select=style