Peterborough Cathedral - The Complete Geometry 1100 - 1500

The author is most grateful for permission to quote from the Thesis Examiner's Report:

"Mr Dudley has accomplished a tremendous task in his painstaking study of the underlying geometry in the design of the Peterborough Cathedral. He raises a number of very interesting points in the process, and his work will ultimately make a valuable contribution to our understanding of the history of Gothic architecture and of medieval geometry and design practices. The geometric analysis which forms the core of the thesis is quite solid, carefully undertaken and clearly presented in visual form. ... I have no doubt that this will become an important contribution to the literature on Gothic architectural geometry. " Professor Ellen M. Shortell Ph.D. Boston. Mass. U.S.A.

This site presents a version of Dr Dudley’s thesis originally titled “By Crafft of Ewclyde. The Sacramental Geometry of Peterborough Cathedral from 1100 to 1500.”   It uncovers the geometry used by the medieval builders of Peterborough Cathedral to produce their architectural designs.  Sacramental geometry used the ancient geometric construction methods of Euclid’s postulates combined with the belief that each geometric figure held special sacred meaning, hence the use of the geometry to design religious buildings and artefacts.  The thesis also explains the means by which medieval architects transferred their design accurately to scale from parchment to building site.  Colin obtained his doctorate at the age of 79 after researching the lost art of sacramental geometry for more than forty years.

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