DODWELL, Edward. Views in Greece, from Drawings by Edward Dodwell Esq. F.S.A &c., London, Rodwell and Martin, 1819.
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After they defeated Xerxes in the naval Battle of Salamis in 480 BC, the Athenians placed an entire captured enemy trireme (warship with three banks of oars) at Sounion as a trophy dedicated to Poseidon. The temple at Sounion was probably built in ca. 440 BC. over the ruins of an earlier temple dating from the Archaic Period. A total of 15 original columns still stand today. The Doric columns were made of locally quarried white marble.
The temple was a hexastyle peripteral structure with 13 columns on the long side, with a pronaos and opisthodomos each having two column in antes. The temple would have looked very much like the contemporary Temple of Hephaestus in Athens.