The principle of architectural designs of buildings and structures is always the raport of three basic criteria: the function, aesthetics and resistance. At the same time, the style and the material have the secondary importance because the material represents known properties, while the style is just an architectural rhetoric.

The mission of the architect arising from the established task, consists in competently solving of an equation with three unknown (the basic criteria mentioned previously), relying at the same time on common sense, on artistic perception and on exact engineering calculation.