dodecastyle

[ doh-dek-uh-stahyl ]
/ doʊˈdɛk əˌstaɪl /

adjective Architecture.

having 12 columns.
(of a classical temple or building in the style of one) having 12 columns on one or either front.
Also do·dec·a·sty·lar, duodecastyle.

Origin of dodecastyle

1815–25; < Greek dōdekástȳlos; see dodeca-, -style2