The most important cult of Athena on the Acropolis was that of Athena Polias, Athena of the city. The site of the altar for Athena Polias can only be guessed at today from cuttings in the rock. During the Panathenaia festival, a large herd of cattle would have been sacrificed on the altar. Only the parts which couldn't be eaten were burnt for the gods. The meat was later given to the people of Athens for a big shared meal.
The design of the altar of Athena Polias is unknown, but probably included a flight of steps up which animals would have been led for sacrifice.