Corinthian columns are the most ornate of the three column orders of ancient Greece: Doric, Ionian, and Corinthian. Defined by their elaborate capitals full of acanthus leaves, these columns are the most slender of the three orders. The Corinthian order was also the most recently developed of the three, following the Ionic order—and if you look closely, you can see how a Corinthian column’s design builds on that of the Ionic.