In the Gothic era, architectural works were designed by using geometrical frameworks based on in praxis verified measurements of a structure. The proportions of constructions, which had proved to be static and aesthetic on the implemented designs, were also applied to later designs, thus defining the actively used composition formulation. During geometric analysis, we encounter repeating rules resulting from the principle of square (“ad quadratum”), equilateral triangle (“ad triangulum”) or exceptionally circle (“ad circulum”).