There is also a building called the Erechtheum. Before the entrance is an altar of Zeus the Most High, on which they never sacrifice a living creature but offer cakes, not being wont to use any wine either. Inside the entrance are altars, one to Poseidon, on which in obedience to an oracle they sacrifice also to Erechtheus, the second to the hero Butes, and the third to Hephaestus. On the walls are paintings representing members of the clan Butadae; there is also inside—the building is double—sea-water in a cistern. This is no great marvel, for other inland regions have similar wells, in particular Aphrodisias
. But this cistern is remarkable for the noise of waves it sends forth when a south wind blows. On the rock is the outline of a trident. Legend says that these appeared as evidence in support of Poseidon's claim to the land.