Because of the gradually diminishing significance of the site, this very early temple of
Archaic Greece was never fully rebuilt and expanded, as happened to most of its contemporaries. It has one of the best preserved
pterons, and "is the first of the great tiled buildings" to survive with readable remains. Originally the walls were mud brick, the columns wood, and the
entablature wood decorated with painted
terracotta. The roof was
tiled in terracotta, a recent innovation for the Greeks; the extra weight compared to thatch or wooden shingles was perhaps a factor driving the change to building with stone. Much later, in the
Hellenistic period, the wooden columns were replaced with stone, but the entablature seems to have been left. There were fifteen columns on each side, and five at each end (counting the corner ones twice), also a row of ten columns down the
cella. The survivals in terracotta are
metopes, nearly three feet square, and mask
antefixes above them. The overall dimensions are c. 40 x 125 ft (12.13 x 38.23 m). It had a very early and rather deep example of an
opisthodomos (rear room) with two columns down the centre. The tiled roof had a
gable at the front, but sloped down at the rear.
Terracottas There are "an elaborate series of terracotta revetments found scattered about the temple site. These include roof tiles, simas, at least two series of antefixes decorated in relief with human busts, a sphinx acroterion and 10 fragmentary metope plaques with painted representations." The metopes include a large gorgon head and various mythological subjects, inside vertical borders of rosettes. One of the best preserved shows
Procne/
Aëdon and
Philomela/
Chelidon preparing
Itys/
Itylus for the dinner table. Their similarity in style to
Corinthian painted pottery of around the 630s BC is the main basis for the dating of the temple, though the clay is local, and the potters may also have been. Some are "inscribed in a mixed alphabet which may well be Aitolian". There are fragments of two sets of antefixes, the second set with heads of men and
silenes suggesting that the roof was partly renewed or remodelled in the mid-6th century. Together with the stone metopes of
"Temple C" at Selinus in
Sicily, of about 550 BC, the metopes of Thermos have been brought into the long-running scholarly discussions over the extent to which the
Doric order in stone recreates or imitates earlier buildings in wood. The two sets "are commonly held to be the oldest metopes known so far". It is argued that both sets are too large ("way too high"), at about 90 cm, for the function traditionally assigned to them in the wood-to-stone model, but instead demonstrate that "the Doric frieze was a decorative rather a structural feature" from the start. File:Metope of Archaic temple of Apollon at Thermon, NAMA 13410, 225656.jpg|Metope of Procne/Aëdon and Philomela/Chelidon carving up
Itys File:Painted terracotta metopes from Thermos (temple of Apollon) - Athens NAM AD 2 - 02.jpg|
Gorgon's head on a metope File:Painted terracotta metopes from Thermos (temple of Apollon) - Athens NAM AD 2 - 08.jpg|Three sitting women File:Painted terracotta metopes from Thermos (temple of Apollon) - Athens NAM AD 2 - 01.jpg|
Perseus running with the Gorgon's head File:Painted terracotta metopes from Thermos (temple of Apollon) - Athens NAM AD 2 - 06.jpg|Hunter with his kill (perhaps
Orion or
Herakles) ==History==