🇳🇬 Nigeria · Ancient city
Ile-Ife
Yoruba Early/Middle Period (1st mill.–16th c; classical 12th–15th c) · Yoruba (Ifè)
Yoruba city producing hyper-naturalistic brass heads and potsherd pavements with unique locally-made High-Lime glass beads.
🇳🇬 Nigeria · Earthwork
Sungbo's Eredo (Ogun) – Yoruba's 160-km Earthwork Rampart
Late Iron Age / Yoruba (Ijebu) · Ijebu Yoruba (Oloye Bilikisu Sungbo tradition)
Largest single monument in Africa: 160 km curvilinear ditch-and-bank snaking 20 m deep through rainforest around medieval Ijebu kingdom (800–1000 CE, Darling charcoal).