Dualism in Andean Art – The Metropolitan Museum of Art https://www.metmuseum.org/essays/dualism-in-andean-art
Subtly or clearly expressed in art, opposite doubles and mirror images reflect the ancient heritage of symbolic dualism in the ideologies, world visions, and social structures of Andean people.
Keros were kept and used in pairs to drink chicha, the sacred corn beer ( 1994.35.15