The Islamized communities who live as traders and artisans among non-Moslem groups in extensive areas of northern Côte d'Ivoire are known for an institution called Do or Lo, one of whose most striking public manifestations is colorful masquerade dancing. The performance of the maskers is accompanied by singing and dancing, expresses the joy. The classical Do mask, in style and design, recalls the kpeliyeemasks of the Senufo, from which they are derived. These masks are among the most popular of those used by the Dosociety. They are danced during the funerals of distinguished Moslem holy men, and their performances also mark the end of Ramadan. The masqueraders are greatly admired for the grace of their dance movements, which they perform in pairs and in perfect unison.