Doric order

ancient Greek style of architecture

The Doric order was one of the three orders or organizational systems of Ancient Greek or classical architecture; the other two canonical orders were the Ionic and the Corinthian. In their original Greek version, Doric columns stood directly on the flat pavement (the stylobate) of a temple without a base; their vertical shafts were fluted with 20 parallel concave  grooves; and they were topped by a smooth capital that flared from the column to meet a square abacus at the intersection with the horizontal beam (“entablature”) that they carried.
See more at Wikipedia.org...

Noun
1. the oldest and simplest of the Greek orders and the only one that normally has no base
(synonym) Dorian order
(hypernym) order