The Hekatompedon or Hekatompedos called also as the first Parthenon was an archaic temple built from limestone, some say that it was placed in the position of the present Parthenon. The temple built in the second half of 6th century BC, during the Peisistratids age, and was the older temple of Athena Polias, the most sacred building of Athens all-time. It's foundations were discovered by the German archaeologist Wilhelm Dorpfeld.
It is identified by some archaeologists with the remains of a building in the southern part of the Mycenaean wall of Acropolis, a building which considered to be the ancient temple (in the place of the Mycenaean palace). It is called also UrParthenon (Primary Parthenon), and had a length of 100 attic feet (32,80 m). Have been saved the sculpture of the pediments, the famous "three-headed daemon", and the lions of limestone, exhibited in the Acropolis Museum. In the main temple was placed the wooden statue (from olive wood) of Athena Polias, and in the megaron (or opisthodomos) votives, the treasures, and material of the worship. There were coloured depictions on the metopes with scenes from the life of Heracles.