Kwena (ruler), was a stone-walled town as large as the capital of Eastern Lunda. The Tswana lived in city states with stone walls and complex sociopolitical structures that they built in the 1300s or earlier. These cities had populations of up to 20,000 people, which at the time rivalled Cape Town in size. Zulu and Nguni Zulu Architecture was constructed with more perishable materials. Dome-shaped huts typically come to mind when one thinks of Zulu dwellings, but later on their design evolved into dome over cylinder-shaped walls. Zulu capital cities were elliptical in plan. The exterior was lined with a durable wood palisade. Domed huts, in rows of 6 to 8, stood just inside the palisade. In the center was the kraal, used by the king to examine his soldiers, hold cattle, or conduct ceremonies. It was an empty circular area at the center of the capital, enclosed by a less durable interior palisade, compared to the exterior. The entrance to the city was opposite to the fortified royal enclosure called the Isigodlo. Zimbabwe Mapungubwe Mapungubwe is considered the most socially complex society in southern Africa and the first southern African culture to display economic differentiation. The elite lived separately in a mountain settlement made of sandstone. It was the precursor to Great Zimbabwe. Large amounts of dirt were carried to the top of the hill. At the bottom of the hill was a natural amphitheater, and at the top an elite graveyard. There were only two pathways to the top, one following a narrow steep cleft along the side of the hill of which observers at the top had a clear view. Great Zimbabwe Great Zimbabwe was the largest medieval city in sub-Saharan Africa. It was constructed and expanded for more than 300 years in a local style that eschewed rectilinearity for flowing curves. Neither the first nor the last of some 300 similar complexes located on the Zimbabwean plateau, Great Zimbabwe is set apart by the large scale of its structures. Its most formidable edifice, commonly referred to as the Great Enclosure, has dressed stone walls as high as extending for approximately , making it the largest ancient structure south of the Sahara. Houses within the enclosure were circular and constructed of wattle and daub, with conical thatched roofs. Torwa State Khami was the capital of the Torwa State. It was the successor to Great Zimbabwe and where