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Monument of the Eponymous Heroes Across the street from the Metroon lie the remains of the Monument of the Eponymous Heroes (Fig. 21). When Kleisthenes created the democracy in 508/7 B.C., he assigned ... Literary references indicate that the Eponymoi were erected as early as 425 B.C., though the remains here go back no earlier than ca. 330 B.C. Cuttings in the sill show that the monument was refurbished on several occasions thereafter and these adjustments may well match changes in the tribal system itself.