Temple T at Selinunte (Sicily), reconstructed elevation of the main facade; Jacques Ignace Hittorff ; Before 1859; Graphite, pen and black ink, watercolour. Photograph: Musée d'Orsay, Wikimedia Commons

Originating in western Greece, it is oldest of the three orders of the classical architecture of ancient Greece, along with the Ionic and Corinthian orders. It is the characterised by its round, simple and unadorned columns.