A column with a square shaft that otherwise reflects the Doric order. Generally, it is a stoutly proportioned column with a simple, round capital.

A column with a square shaft that otherwise reflects the Ionic order. Generally, it is a more slender column, and its capitals are recognized by two scrolling volutes.

A column with a square shaft that otherwise reflects the Corinthian order. Generally, it is the most slender column of all the orders, and its capital is the most ornate, with layers of stylized acanthus leaves.