pentastyle
/ˈpɛntəstʌɪl/Architecture. Now rare
noun
A building or portico with five columns or five rows of columns.
adjective
Of a portico, etc.: five-columned.
Origin
Early 18th century; earliest use found in Ephraim Chambers (?1680–1740), encyclopaedist. From penta- + ancient Greek στῦλος pillar. Compare French pentastyle.