In 1871, European explorers stumbled across an astonishing ruined city, deep in the African interior. Great Zimbabwe has been a source of fascination and controversy ever since, a symbol of African genius and a fascinating insight into the empires which once dominated southern Africa. Casely-Hayford goes in search of the roots of this immense kingdom. He traces the trade in gold and precious goods that sustained it and uncovers the kingdoms that grew up around it. (thetvdb.com)