The Kingdom of Butua[pronunciation?] or Butwa (c. 1450 - 1683) was a pre-colonial African state located in what is now southwestern Zimbabwe. Butua was renowned as the source of gold for Arab and Portuguese traders. The region was first mentioned in Portuguese records in 1512.
The foundations of the Khami Ruins show a striking resemblance to the pattern of masonry at the base of the Zimbabwe Ruins. Hence the Kalanga are thought to have built Khami, Lusvingo, Mapungugwe and other ruins scattered across western Zimbabwe and east Botswana.