Corinthian order with a continuous design or left plain, as at the U.S. Capitol extension ("illustration, right"). At the Capitol the proportions of architrave to frieze are exactly 1:1. Above that, the profiles of the cornice moldings are like those of the Ionic order. If the cornice is very deep, it may be supported by brackets or modillions, which are ornamental brackets used in a series under a cornice. The Corinthian column is almost always fluted, and the flutes of a Corinthian column may be enriched. They may be filleted, with rods nestled within the hollow flutes, or stop-fluted, with the rods
Corinthian order colonettes within the same system. During the 16th century, a sequence of engravings of the orders in architectural treatises helped standardize their details within rigid limits. Sebastiano Serlio; the "Regola delli cinque ordini" of Giacomo Barozzi da Vignola (1507–1573); the "Quattro libri di Architettura" of Andrea Palladio, and Vincenzo Scamozzi's "Idea della Architettura Universale," were followed in the 17th century by French treatises with further refined engraved models, such as Perrault's. Corinthian order The Corinthian order is the last developed of the three principal classical orders of ancient Greek and Roman architecture. The other two are the Doric order which