Structures can have round, square, and also polygonal sections. The scope of their use includes both decorative and functional options. There are the following types of columns: Tuscan, Doric, Ionic, Corinthian and semi-columns, balusters for fencing stairs and terraces.
The classical stone column consists of several parts: base, column shaft (body, fust) and capital. The followings can be located under the base: floor, pedestal or sole plate (stylobate). The abacus (plate or its imitation with straight or curved ends) is placed above the capital of a classic stone column The column shaft can be flat or withcorrugations (parallel grooves along the shaft), as well as direct or with entasis (gradual reduction in diameter to the top of the column starting with a third of the height). There are dome-shaped column shafts.