Vitruvian module

In the Tuscan order, it only consists of a plain face, crowned with a Annulet (architecture), and is half a Vitruvian module in height.

Other such systems of 'ideal proportions' in painting and sculpture include the Polyclitean canon and Vitruvian modules, best known in the Vitruvian Man.

Vitruvius compiled standard intercolumniations for the three classical Greek orders, expressed in terms of the column diameter, twice the Vitruvian module, and he warned that when columns are placed three column-diameters apart or more, stone architraves break.

An illustration of Andrea Palladio's Doric order, as it was laid out, with modules identified, by Isaac Ware, in 'The Four Books of Palladio's Architecture' (London, 1738) is illustrated at Vitruvian module.