Column cylindrical disks of alternating diameter. The shaft is almost never fluted. The proportions vary, but are generally similar to Doric columns. Height to width ratio is about 7:1. The Ionic column is considerably more complex than the Doric or Tuscan. It usually has a base and the shaft is often fluted (it has grooves carved up its length). The capital features a volute, an ornament shaped like a scroll, at the four corners. The height-to-thickness ratio is around 9:1. Due to the more refined proportions and scroll capitals, the Ionic column is sometimes associated with academic buildings. Ionic style columns
Corinthian order banding that forms the base of the capital, recalling the base of the legendary basket. Most buildings (and most clients) are satisfied with just two orders. When orders are superposed one above another, as they are at the Flavian Amphitheater—the Colosseum—the natural progression is from sturdiest and plainest (Doric) at the bottom, to slenderest and richest (Corinthian) at the top. The Colosseum's topmost tier has an unusual order that came to be known as the Composite order during the 16th century. The mid-16th-century Italians, especially Sebastiano Serlio and Jacopo Barozzi da Vignola, who established a canonic version of the orders,