The Erechtheion is an outstanding monument of ancient Greek architecture, one of the main temples of ancient Athens, located on the Acropolis north of the Parthenon. The building dates from 421-406 BC. e. Made in the Ionic order. The architect is not known. The temple is dedicated to Athena, Poseidon and the legendary Athenian king Erechtheus.

The Erechtheion was built in 406 BC. e., it was located on the site of the mythical dispute between Athena and Poseidon for the possession of Attica. The temple was a kind of repository of the most important relics of the policy. The name of the temple was due to the remains of the coffin of Erechtheus. It is known that there were many other less significant shrines. The olive tree of Athena itself (in 480 it was burned, but then, according to legend, was reborn again) grew nearby - in the sanctuary of the nymph Pandrosa adjoining the Erechtheion from the west. In the temple there was also a well with a key of salt water, knocked out by Poseidon.
Until the 17th century, the building was in a more or less decent condition. In 1687, the Venetian troops, besieging Athens, caused enormous damage to the Erechtheion. After the restoration of Greek independence, the fallen fragments were put in place, but the building is still only ruins. The best preserved portico of Pandrosa is on the north side.