The Erechtheion temple was built between 420 and 406 BC and is the most asymmetric structure of ancient Greece. The central building is the Naos, adorned by 6 m high columns. The highlight of this building is the Korenhalle, which is supported by six large female figures, the slaves from Karyai, the Caryatids. However, the figures are only replicas, five of the originals are in the Acropolis Museum, one in the British Museum. The temple housed important relics of the city: traces of Poseidon's trident, a salt source created by him in the conflict with Athena, and the grave of the legendary King Kekrops I. The Erechtheion temple has also been repurposed as a church, government seat, and harem.