Classical order Classical order An order in architecture is a certain assemblage of parts subject to uniform established proportions, regulated by the office that each part has to perform. Coming down to the present from Ancient Greek and Ancient Roman civilization, the architectural orders are the styles of classical architecture, each distinguished by its proportions and characteristic profiles and details, and most readily recognizable by the type of column employed. The three orders of architecture—the Doric, Ionic, and Corinthian—originated in Greece. To these the Romans added, in practice if not in name, the Tuscan, which they made simpler than Doric, and the
Tuscan order frontage is a careful exercise in revivalism, there are minimal plain bases to the thick fluted columns and, despite having metope reliefs and a large group of sculpture in the pediment, there are no triglyphs or guttae. Nonetheless, despite these "Tuscan" aspects, the overall impression is strongly Greek and it is rightly always described as "Doric". Tuscan is often used for doorways and other entrances where only a pair of columns are required, and using another order might seem pretentious. Because the Tuscan mode is easily worked up by a carpenter with a few planing tools, it became part of