An ancient Nok civilization terracotta sculpture featuring a human figure depicts a waist high man holding a vessel in his hands with a detailed facial expression. Refers to artifacts created by the Nok culture, which existed in what is now modern day Nigeria between 1000 BCE and 500 CE. The sculpture was created using a coiling technique, where long rolls of clay were stacked and shaped to form the desired figure. Ancient African Culture Artifacts And Sculpture Art Collectibles.