Sungbo's Eredo
How did a pre-colonial forest kingdom in what is now southwest Nigeria organize the labour to dig a single continuous bank-and-ditch running some 160 kilometres — moving, by one estimate, more earth than the Great Pyramid of Giza — and why has one of Africa's largest ancient monuments been so little studied that even its date and purpose remain unsettled?
c. 800–1000 CE (Darling's estimate; more recent excavation points to the 14th–15th century) · Ijebu-Ode, Ogun State, NigeriaAdded July 2026