Plaster cast of a reclining man usually identified as the personification of the river Kephissos, although it has also been suggested that he may be Ilissos or Eridanos. The original sculpture is exhibited in the British Museum in London, after it was removed by Thomas Bruce, lord of Elgin, who between 1801 and 1804 when Greece was still under Ottoman rule forcibly detached from the pediment most of the sculptures that he found in their original places.

The man is depicted nude, trying to raise himself by supporting his weight on the left arm while turning the rest of his body towards the viewer. His movement causes his himation to slip from his shoulders and spill on the ground. The rear side of the statue has been worked in amazing detail although it wouldn’t be viewed once the sculpture was placed in the pediment. The man’s head, as well as parts of his arms and legs are missing.

The two Parthenon pediments are adorned with about fifty oversized statues. The sculptures, perfectly worked even on their unseen, rear sides, present scenes from the myths of the goddess Athena.

The west pediment of the Parthenon portrays the dispute between Athena and Poseidon regarding who would become the divine protector of Athens. The contest was held on the Acropolis in the presence of the city’s mythical kings Kekrops and Erechtheus and other local heroes, who as judges decided the outcome in favour of Athena, preferring her gift, the olive tree, to the salty water offered by Poseidon. The centre of the scene is occupied by the two protagonists and their chariots whereas the pediments' corners contain the personifications of two rivers that flowed in ancient Athens, Ilissos and Kephissos. Due to the misadventures suffered by the monument over the following centuries many sculptures have been lost, some survive in mutilated form whereas others are represented only in small fragments.