An ancient Nok civilization terracotta sculpture featuring a human head with distinct facial features, including an open mouth, elaborate hairstyle, and bulging eyes. 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.