"One of the copper alloy heads from the British Museum's Kingdom of Ife exhibition.... The heads are probably portraits of the rulers of Ife, dating from the 12th to 14th centuries, a little before European art was making its transition from the staid Byzantine mode to Renaissance naturalism." http://www.theguardian.com/commentisfree/2010/mar/04/in-praise-of-sculputres-ife