The ancient Bantu people who inhabited the area of Great Zimbabwe around the 4th century AD probably built the complex between 1000 and 1200 AD. The Gokomere traded via ancient trading routes over the Chimanimani Mountains on the current Zimbabwe / Mozambique border with the Swahili civilization on the Kenyan and Tanzanian coast. This group gave rise to the maShona and the waRozwi tribes. They may also comprise the majority of the African ancestry of the Lemba people, who claim descent from the ancient Jews via Sena in Yemen (however, this belief is due to Christian influence). The modern descendants of the waRozwi are called the Barotse. They speak the Karanga language and second languages like English in Zimbabwe and Sena, Ndau dialect of Shona, and Portuguese in Mozambique.