The Altar to the Hand (or Ikegobo).  

The one in our book (and shown to the right) is in the collection of the British Museum.  Read about it here.  

Other examples at the Metropolitan Museum in New York:  

• Oba with Animals (Ikegobo of Ezomo Ehenua) 
• Altar to the Hand (Ikegobo) 
• and another one, made of wood

Remember to consider how purpose, materials, imagery (iconography), and aesthetic values all relate to one another.