Oblong plate that functioned as a boundary marker for a metal-processing workshop at Souriza in Attica. According to the inscription, casually written in four lines on the stone, the workshop was owned by Simos from Paiania. It reads “Simus katelaven Askalipiakon (Asklipiakon)”(The region of Asklepius (Asklepiakon) belongs to Simos”). Many similar boundary markers from the Classical period have been found near workshops in the region of Lavrion. Most of them had the name of a god engraved on them in order to secure help in the difficult project of mining and processing metals.