http://agathe.gr/guide/boundary_stones_and_house_of_simon_the_cobbler.html
Boundary Stones and House of Simon the Cobbler Inscribed marble posts were used to mark the entrances to the Agora wherever a street led into the open square. Two have been found in situ, inscribed with ... around 500 B.C. (Figs. 23 ... Figure 23. Agora boundary ... in Figure 23, except all