Complex sentence: The East metopes of the Parthenon, situated above the entrance to the temple, depict the final stages of the cosmogonic battle between the Olympian gods and the Giants (Gigantomachy).
Split into simpler sentences: The East metopes were situated above the entrance to the temple. They depict the final stages of the cosmogonic battle between the Olympian gods and the Giants (Gigantomachy).