Nigeria. Ogoni ceremonial mask. 1,4 Kg - 33x23x18 cm. First half of the 20th century. Old tribal mask with white pigmentation. The Ogoni live to the east of the Niger delta, in a fertile area rich in petroleum resources. Despite the efforts of Christian missionaries, they have retained a vital, regionally varied masquerading activity that is in part deeply rooted in their own tradition and in part adopted from neighboring ethnic groups such as the Ibibio or Ijo. Ogoni mask dances serve a great variety of functions, which, depending on the region, can extend from pure entertainment to participation in funeral services and harvest festivals, all the way to the implementation of judicial verdicts. The masks of wild animals are danced, acrobatically, on the occasion of agrarian rituals.