Ancient Greek temple three steps, the "crepidoma". The uppermost level of the "crepidoma" provides the surface on which the columns and walls are placed; it is called stylobate. Placed on the stylobate are the vertical column shafts, tapering towards the top. They are normally made of several separately cut column drums. Depending on the architectural order, a different number of flutings are cut into the column shaft: Doric columns have 18 to 20 flutings, Ionic and Corinthian ones normally have 24. Early Ionic columns had up to 48 flutings. While Doric columns stand directly on the stylobate, Ionic and Corinthian ones possess a
Renaissance High Renaissance was the rebuilding of St. Peter's Basilica, combining the skills of Bramante, Michelangelo, Raphael, Sangallo and Maderno. During the Renaissance, architects aimed to use columns, pilasters, and entablatures as an integrated system. The Roman orders types of columns are used: Tuscan, Doric, Ionic, Corinthian and Composite. These can either be structural, supporting an arcade or architrave, or purely decorative, set against a wall in the form of pilasters. One of the first buildings to use pilasters as an integrated system was in the Old Sacristy (1421–1440) by Brunelleschi. Arches, semi-circular or (in the Mannerist style) segmental, are often