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date: 09 May 2021

entasis

Source:
The Oxford Companion to Architecture
Author(s):
Anthony QuineyAnthony Quiney

entasis 

A slight convexity in the taper of a classical column or pilaster counteracting the optical illusion of concavity that would result from a straight taper. The column’s diameter is gradually but increasingly reduced as it rises by the application of a prescribed curve for each of the orders. Entasis is occasionally employed elsewhere, notably for a few medieval spires such as those of Notre-Dame-la-Grande, Poitiers (c.1130–45), and Hope church, Derbyshire (14th century, rebuilt).

Anthony Quiney