File:The Sanctuary of Zeus (St. Marina) on July 11, 2020.jpg

English: "Two early archaic (6th cent. B.C.) retrograde inscriptions "HOROS" boundary and "HOROS DIOS" boundary of Zeus have led to identifying the visible remains on this projection of the Hill of the Nymphs (St. Marina) as the earliest known sanctuary of Zeus in Attica.

According to the literary sources and the archaeological evidence, the worship of Zeus seems to prevail in the area around the Pnyx. Furthermore, the cult of the father of the gods and men is strongly related to several other deities (Nymphs, Muses, Eilythyia, Artemis), which had their sanctuaries in the same area. The main area of the sanctuary in the centre of the foothill correlates with the inscription and the neighbouring rock-cut structure with a drainage channel as its circumference is compatible with an altar for the god. In the south, this area is bounded by a grooved road, to which the inscription "HOROS" is also thought to refer. The complex on the foothill is shaped into five rock-cut terraces, which function as a unit being connected by stairs, while two entrances with carved staircases give access to the sanctuary from the south. On the surfaces of the five terraces, the density of the drainage channels, rooms, wells, cisterns, and altars is impressive; investigation has shown a continuous use of the area from archaic to post-Byzantine times. The founding, in Byzantine times, within an ancient cistern, of the chapel of St. Marina as protectress of sick children is considered continuity of ancient worship. The chapel preserves six superimposed series of wall-paintings dating from the 13th through the 18th century. In 1927 the elegant church of St. Marina was built, designed originally by Ernest Ziller.

In the custom of "Kylethra", in which women slide down the smooth rocks of St. Marina in order to ensure fertility, we see even in recent times, the function of Eilythyia and the Nymphs as goddesses of fecundity." Textː Information board at the archaeological site.