An intricate turquoise mask, believed to depict the Aztec fire god Xiuhtecuhtli, is displayed at the British Museum. Originating from 16th-century Mesoamerica, the wooden mask features turquoise mosaic, mother-of-pearl eyes, and conch shell teeth. Central to Aztec rituals, such masks symbolised fire and renewal. The artefact may have been part of ceremonial practices ...