CONGOLESE BEMBE PEOPLE ANTHROPO-ZOOMORPHIC BUTENDE MASK. Bembe wooden mask, specifically an anthropo-zoomorphic plank mask from the Bembe people of the Democratic Republic of Congo. These masks are traditionally used in circumcision rites called butende. The mask is characterized by exaggerated, owl-like features, including large, concave eye sockets and a small mouth. The eyes are a dominant feature and may symbolize a window into the spiritual world. - Height:. Estimate $120-150