Doric order The Roman architect Vitruvius, following contemporary practice, outlined in his treatise the procedure for laying out constructions based on a module, which he took to be one half a column's diameter, taken at the base. 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. According to Vitruvius the height of Doric columns is six or seven times the diameter at the base. This gives the Doric columns a shorter, thicker look than Ionic columns, which have 8:1
Villa Lante al Gianicolo and elegance to exploit the ridge-top position and overcome the rather small Roman footprint. The orders are delicate, with Tuscan or Doric columns and pilasters in pairs on the main floor, and extremely shallow Ionic pilasters above, whose presence is mainly conveyed by a different colour. Alternate loggia openings are heightened by arches above the entablature. Romano's willingness to play with the conventions of the classical orders is already in evidence; the Doric here has guttae but no triglyphs on its narrow entablature. The volutes of the Ionic capitals of the entrance facade are repeated in the window surrounds between