NIGERIAN YORUBA EGUNGUN SOCIETY GELEDE HELMET MASK. Nigerian Yoruba Egungun society Gelede helmet mask. Gelede masks are used in performances that honor and appease powerful female ancestors, known as "iyami". These performances are integral to Yoruba culture, particularly in the Egbado Yoruba communities, where they are performed annually to recognize the iyami's powers and seek their blessings. - Height approximately: 12 inches. Estimate $150-250