The Textbook of Architecture

Rules · Proportion · Ornament · Optics

Proportion each order for its real size

Do not enlarge or reduce an order by one set of ratios: design its members for the size at which it will be built, the material and the distance from which it is seen. In a large order make the parts relatively finer, in a small one relatively bolder.

The Pantheon: its Corinthian portico columns are some 14 m high. Mauch argues that an order fine at this size would look like a model if simply scaled down. Open in Models ↗

Comparing the small Monument of Lysicrates with the portico of the Pantheon, Mauch observes that the Greek order built at the Pantheon’s size would look bold and monstrous, and the Pantheon’s reduced to the size of the monument would look like a model. The ancient builders calculated every part for its actual size; he notes on Plate 3 that the larger the Doric order, the finer its parts were made.

His target is the Renaissance order-book, which gives one rule for columns fifteen feet or fifty feet high, in dark stone or light, polished or rough. The same argument explains why he praises the small Corinthian capital of the Tower of the Winds but would not copy it at great scale.

Related rules

The Derand–Blondel rule for abutments

To find how thick the pier of an arch must be, divide the intrados into three equal parts; draw a line from the springing through the first division, and produce it beyond the springing by its own length. A vertical through the end of that line marks the outer face of the pier.

pier ≈ ¼ span (semicircle) · ≈ 0.23 span (equilateral) · less for a lancet

Cite this page Chris Paton, “Proportion each order for its real size”, The Textbook of Architecture, https://textbookofarchitecture.com/rule/mauch-scale. Text, drawings and models licensed under CC BY-NC 4.0.