Column is an important part of the ancient Roman Greek architecture. A Roman Greek column typically consists of three parts: column cap or column capital, column base and column body. Column bases even in Greek architecture are fairly simple and dominated by different round configurations, which is often called Doric base column. However, the caps have many varieties. In general, Roman Greek column capitals can be classified into simple doric style column, contemporary ionic style column and ornamental corinthian style column. Each category of column design yet has several variations. The Doric order was one of the three orders or organizational systems of ancient Greek or classical architecture; the other two canonical orders were the Ionic and the Corinthian.