An Oba's crown represents the highest level of authority vested in Yoruba rulers. Referred to as an Ade, the bead-embroidered crown is the foremost attribute of the ruler. An oba's crown may also be referred to as an Adenla, or great crown. Andenla are elaborate conical headdresses, like the ade, but feature a heavily beaded veil that covers the face. In his article on the topic, Robert F. Thompson writes, "The crown incarnates the intuition of royal ancestral force, the revelation of great moral insight in the person of the king, and the glitter of aesthetic experience."