Ionic order a version of such a perfectly four-sided Ionic capital; Scamozzi's version became so much the standard, that when a Greek Ionic order was eventually reintroduced, in the later 18th century Greek Revival, it conveyed an air of archaic freshness and primitive, perhaps even republican, vitality. The Ionic column is always more slender than the Doric; therefore, it always has a base: Ionic columns are eight and nine column-diameters tall, and even more in the Antebellum colonnades of late American Greek revival plantation houses. Ionic columns are most often fluted. After a little early experimentation, the number of hollow flutes in
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