Even to-day, twenty years after its discovery in September 1957, the great corpus of sculptures from the grotto by the sea-shore at Sperlonga still retains many of its secrets. The sheer quantity and richness of the material, its clearly programmatic character, and the enigmatic personalities and affiliations of its sculptors cannot but prompt any visitor to the cave and museum, specialist or no, to ask: what was the purpose of this great complex of Odyssean themes? When were they carved and for whom? Only recently, with the preliminary publication of the major fragments and their replicas by Conticello and Andreae, have their subjects and positions been satisfactorily determined, and the groundwork laid for a solution to such problems as these.
All four major groups had, as their protagonist, Odysseus. First of all, at the mouth of the cave on the left, he was shown dragging the limp corpse of Achilles away from the battle before Troy (Pl. IX, 1), and on the right, standing thwarted of his plan to snatch the Palladion away from Diomedes (Pl. IX, 2 and 3); in the centre of the pool the scene shifted to his wanderings, with his ship, its helmsman still clinging desperately to the stern, enmeshed in Scylla's coils (Pl. IX, 4–X, 2), while in the dim light of the cavern at the rear to the right, he appeared for the last time to direct his companions in the blinding of a gigantic Polyphemus (Pl. X, 3–XI, 4; cf. Pl. XII, I).