The pedimental sculptures of the temple of Zeus are among the finest examples of the Severe Style of the early Classical period. They are the work of an unknown artist, conventionally dubbed 'creator of Olympia'. The east pediment, which stood over the temple's main entrance, depicted the chariot race between Pelops and Oinomaos. Zeus presides over the race flanked by the groups of Pelops-Hippodameia and Oinomaos-Sterope. The heroes' quadrigae (four-horse chariots), servants, charioteers and diviners complete the composition, along with the reclining personifications of Olympia's rivers, the Alpheios and the Kladeos, at the angles. Although static and autonomous, the figures, fifteen in all, betray the tension before the tragic end of the race, which Pelops, founder of the dynasty of the Pelopides, wins, while Oinomaos is killed in accordance with the oracle.