A 
large marble relief believed to have been part of the frieze of the Temple of Zeus in Agrigento, Sicily, has been recovered from the seabed off the coast of the resort town of San Leone two miles south of Agrigento’s famous Valley of the Temples. The relief features a rampant horse, an iconographic representation associated with Zeus whose chariot was drawn by the Four Winds in the form of horses. Its dimensions and composition suggest it was a detail from the timpanum, the relief over the front entrance to the temple.
The Temple of Zeus was erected by the tyrant Theron, ruler of the Greek colony of Acragas (now known as Agrigento) and a large part of Western Sicily from 488 B.C. to 473 B.C. He built the temple after his victory in the Battle of Himera in 480 B.C. Ancient sources note that the timpanum pediment had a pair of prancing horses.
The relief fragment is made of a massive block of Proconnesian marble and is 6.5 feet by 5.2 feet and more than one foot thick. It lay at a depth of 30 feet and had previously been documented as an underwater archaeological artifact, but it had never been closely observed and the record described it as an unfeatured basin. In October 2022, divers explored the object, photographing it extensively and creating a highly detailed 3D photogrammetry composite image. The photographs captured the real significance of the piece, revealing the carving of the horses.
Sicily’s Superintendency of the Sea ordered the piece be recovered so that the thick layers of concretions could be cleaned off and its details uncovered. It took three attempts to successfully recover the heavy relief. (Turbulence in the sea foiled the first two attempts.)
In the 5th century BC, Herodotus wrote in Bk7.166-168 about the Battle and Carthaginians under Hamilcar I of Carthage.
Gelon and Theron, tyrant of Acragas/Agrigent, had been victorious over the Carthaginians in Sicily. Hamilcar, on the father’s side a Carthaginian but on the mother’s Syracusan, who had become king of the Carthaginians by merit, about being worsted in the battle, had disappeared.
According to the Carthaginians, he had been making sacrifices to get good omens of success, offering whole bodies of victims upon a great pyre, and when he saw that there was a rout of his own army, he had thrown himself into the fire, and thus was burnt up and gone.
However, it had been Carthaginian funds, tributes and prisoners, who seem to have played a role in renewed building activities. After the defeat at Himera in 480 BC, the Carthaginians in 406BC layed siege on Acragas, in 405 BC the city was destroyed, and in Syracuse, Dionysius I seized power and became tyrant.
To conclude, the Carthaginians may have been the culprits in 405BC and –possibly having sacrificed a few children– demolished what was left of the unfinished Temple of Olympian Zeus (a.k.a Olympeion).
According to Diododorus of Sicily (“Siculus”), 13.82.6: “witness to the luxury of the inhabitants is also the extravagant cost of the monuments which they erected, some adorned with sculptured racehorses and others with the pet birds kept by girls and boys…”