What are the three orders of classical Greek architecture?

The majestic temples of ancient Greece followed a sophisticated system of design known as an architectural "order." An order was a complete set of rules governing a building's proportions and decoration, most easily identified by its distinct style of column and capital, the decorative element at the very top. The ancient Greeks developed three major orders over time, each with its own unique character and visual language that reflected evolving tastes and engineering.

The easiest way to tell them apart is to look at the capital. The Doric is the oldest and most robust, with a simple, unadorned saucer-shaped capital and no base, as seen on the Parthenon. The Ionic order is more slender and elegant, instantly recognizable by the scroll-like ornaments, or volutes, on its capital. The latest and most ornate of the three is the Corinthian, distinguished by its elaborate capital carved with decorative acanthus leaves. These classical styles were so influential that they were adopted by the Romans and continue to be used in the design of important buildings to this day.