|Summary:||Altar enclosed in a peribolos wall; near the north end of the Agora.|
|Date:||ca. 522 BC - 425 BC|
Rectangular altar. Peribolos wall of stone posts and slabs supported by a poros sill. Entrances on east and west.
Identified by an inscribed marble statue base found in situ on west side of the peribolos wall. Original altar was built in 522/21 B.C. by Peisistratos. Rebuilt ca. 425 B.C. to repair damage suffered in the Persian invasion of 480/79 B.C. The altar was used as the central point for measuring road distances. From the 5th century B.C., the altar became associated with the Goddess of Pity, probably because the enclosed area served as a place of asylum. A round marble altar of the 4th century B.C. may also have been in the sanctuary.