In classical architecture, the term "order" is used to distinguish between different styles of columns and entablatures used in Greek and Roman temples and buildings. There are five orders but the main three are Doric, Ionic, and Corinthian. Doric columns are the heaviest with a plain capital and thick shaft. Ionic columns have greater elegance with distinctive volutes and a thinner shaft. The Corinthian order is also tall and elegant with acanthus leaf decoration on the capital and a base.