The Geometry of Bourges Cathedral

This article presents a geometrical analysis of Bourges Cathedral, based on the application of computer-aided design (CAD) techniques to the results of a recent and highly precise laser survey. This analysis reveals that the cathedral's original designer developed a tightly interlocking and str...

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Main Author: Robert Bork
Format: Article
Language:English
Published: Open Library of Humanities 2014-09-01
Series:Architectural Histories
Subjects:
Online Access:http://journal.eahn.org/articles/150
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author Robert Bork
author_facet Robert Bork
author_sort Robert Bork
collection DOAJ
description This article presents a geometrical analysis of Bourges Cathedral, based on the application of computer-aided design (CAD) techniques to the results of a recent and highly precise laser survey. This analysis reveals that the cathedral's original designer developed a tightly interlocking and strikingly unified design, in which the five-fold subdivision of the chevet ground plan set proportions that would be vertically extruded into an elevation that can be inscribed both within a square and within a series of progessively smaller equilaterial triangles. These results contribute to an ongoing debate about the use of ‘ad quadratum’ and ‘ad triangulum’ geometries in Gothic architecture, and they provide new evidence for the geometrical coherence of Gothic cathedral design. In methodological terms, meanwhile, this discussion demonstrates the potential of CAD-based geometrical analysis for the study of precisely surveyed medieval buildings. The sequence of images being analysed can be viewed as supplementary material at: <a href="http://dx.doi.org/10.5334/ah.bz.s1">http://dx.doi.org/10.5334/ah.bz.s1</a>
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spelling doaj.art-9ddfa28d8ba749e2baee619d914e49d32022-12-22T00:31:26ZengOpen Library of HumanitiesArchitectural Histories2050-58332014-09-012110.5334/ah.bz61The Geometry of Bourges CathedralRobert Bork0The University of IowaThis article presents a geometrical analysis of Bourges Cathedral, based on the application of computer-aided design (CAD) techniques to the results of a recent and highly precise laser survey. This analysis reveals that the cathedral's original designer developed a tightly interlocking and strikingly unified design, in which the five-fold subdivision of the chevet ground plan set proportions that would be vertically extruded into an elevation that can be inscribed both within a square and within a series of progessively smaller equilaterial triangles. These results contribute to an ongoing debate about the use of ‘ad quadratum’ and ‘ad triangulum’ geometries in Gothic architecture, and they provide new evidence for the geometrical coherence of Gothic cathedral design. In methodological terms, meanwhile, this discussion demonstrates the potential of CAD-based geometrical analysis for the study of precisely surveyed medieval buildings. The sequence of images being analysed can be viewed as supplementary material at: <a href="http://dx.doi.org/10.5334/ah.bz.s1">http://dx.doi.org/10.5334/ah.bz.s1</a>http://journal.eahn.org/articles/150BourgescathedralGothicarchitecturegeometry"ad quadratum""ad triangulum"
spellingShingle Robert Bork
The Geometry of Bourges Cathedral
Architectural Histories
Bourges
cathedral
Gothic
architecture
geometry
"ad quadratum"
"ad triangulum"
title The Geometry of Bourges Cathedral
title_full The Geometry of Bourges Cathedral
title_fullStr The Geometry of Bourges Cathedral
title_full_unstemmed The Geometry of Bourges Cathedral
title_short The Geometry of Bourges Cathedral
title_sort geometry of bourges cathedral
topic Bourges
cathedral
Gothic
architecture
geometry
"ad quadratum"
"ad triangulum"
url http://journal.eahn.org/articles/150
work_keys_str_mv AT robertbork thegeometryofbourgescathedral
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