The Double-headed serpent is an Aztec sculpture kept at the British Museum. It is a snake with two heads composed of mostly turquoise pieces applied to a wood base, it is one of nine mosaics of similar material in the British Museum; there are thought to be about 25 such pieces from that period in the whole of Europe. It came from Aztec Mexico and might have been worn or displayed in religious ceremonies. It is possible that this sculpture may be one of the gifts given by the Aztec emperor, Moctezuma II, to Spanish conquistador Hernán Cortés when he invaded in 1519. The mosaic is made of pieces of turquoise, spiny oyster shell and conch shell.