Koldewey & Puchstein p. 132-136 

SUARÈS, André. Temples Grecs Maisons des Dieux. Illustré de quatorze eaux-fortes originales par Pierre Matossy [Paris, André Dantan, 1937].

http://www.ancient.eu/Segesta

The 5th century BC temple at Segesta has a commanding view of the surrounding countryside. The Doric style temple may never have been finished and likely abandoned  in ancient times, since it has no inner structure or foundation. The temple was built using travertine from Alcamo, and had 6 columns on each end and 14 columns along the length, all standing on a three and a half step base (crepidoma). Each column stands 9.33 metres high, although the columns were never fluted. The freeze has blank metopes.

The temple has undergone some modern restoration using supporting steel bars and  resins to fill in missing pieces. The whole structure has been treated with a water-resistant solution to ensure its continued preservation against the elements.