This stele is kept in the museum of Eleusis.

Its text refers to a decree concerning the manufacture of bronze fittings known as “empolia” and “poloi” for the erection of the columns of the Philonian Stoa, named after the architect Philon, a portico in front of the much older building, the Telestirion. The decree comprises strict technical specifications, and, therefore, constitutes one of the oldest European standards.