The Corinthian order is one of the Classical orders of Greek and Roman architecture, although it was seldom used in Greek architecture. The other two orders were the Doric and the Ionic. (When classical architecture was revived, two more orders were added to the canon, the Tuscan order and the Composite order.)

The Corinthian order was said to have been invented by an architect, Callimachus, who was inspired by the sight of a votive basket that had been left on the grave of a young girl. A few of her toys were in it, and a square tile had been placed over the basket, to protect them from the weather. An acanthus plant had grown through the woven basket, mixing its spiny, deeply cut leaves with the weave of the basket. Or so Vitruvius said. Claude Perrault incorporated a vignette of the tale in his illustration of the Corinthian order for his translation of Vitruvius, published in Paris, 1684. Perrault demonstrates in his engraving how the proportions of the carved capital could be adjusted according to demands of the design, without offending. The texture and outline of Perrault’s leaves is dry and tight compared to their 19th-century naturalism at the U.S. Capitol.

A Corinthian capital may be seen as an enriched development of the Ionic capital, though one may have to look closely at a Corinthian capital (illustration, right) to see the Ionic volutes at the corners, perhaps reduced in size and importance, scrolling out above the two ranks of leaves, and the smaller volutes scrolling inwards to meet each other on each side. The leaves may be quite stiff, schematic and dry, or they may be extravagantly undercut, naturalistic and spiky. In Late Antique and Byzantine practice, the leaves may be blown sideways, as if by the wind of Faith. Unlike the Doric and Ionic column capitals, a Corinthian capital has no neck beneath it, just a ring-like astragal molding or a banding that forms the base of the capital, recalling the base of the legendary basket.