http://agathe.gr/guide/altar_of_the_twelve_gods.html
Altar of the Twelve Gods Near the middle of the open square, somewhat to the north, lay the Altar of the Twelve Gods (Fig. 7), today largely hidden under the Athens–Piraeus railway (1891). A corner of ... Altar of the Twelve Gods Near the middle of the open square, somewhat to the north, lay the Altar of the Twelve Gods (Fig. 7), today largely hidden under the Athens–Piraeus railway (1891). ... One corner of the sill only is visible, just south of the modern Athens–Piraeus railway. ... On a milestone dating to ca. 400 B.C. we read: "The city set me up, a truthful monument to show all mortals the measure of their journeying: the distance to the altar of the twelve gods from the harbor is forty-five stades" (IG II2 2640).
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