A certain assemblage of portative and portate parts of a load-bearing construction, their structure and artistic treatment. Portative element – a column, consisting of capital, shaft and foundation. Portate horizontal parts form the entablature, consisting of an architrave (lower part), frieze (middle part) and cornice (top offset part). Doric order – one of the main architectural orders, characterized by the column narrowing upwards with cannelures without foundations and by capital in the shape of a drum. It is a key element of monumental arrangement of classical architecture. Ionic order – one of the main architectural orders, has a slender column with foundation and shaft trenched with cannelures. Its differential characteristic is a capital in the shape of a drum with two volutes. The friso is often covered with a relief. Corinthian order – is the finest order characterized by elegant columns with cannelures and foundations, crowned with a splendid capital made of ornamental leaves and small volutes. Tuscan order – simplified version of the Doric order. Has a column without cannelures and a plain friso