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
Bodleian Library the "Old Schools Quadrangle", or the "Old Library") was built between 1613 and 1619 by adding three wings to the Proscholium and Arts End. Its tower forms the main entrance to the library, and is known as the Tower of the Five Orders. The Tower is so named because it is ornamented, in ascending order, with the columns of each of the five orders of classical architecture: Tuscan, Doric, Ionic, Corinthian and Composite. The three wings of the quadrangle have three floors: rooms on the ground and upper floors of the quadrangle (excluding Duke Humfrey’s Library, above the Divinity School)