Pierre Bellenguez
Pierre Bellenguez is a French author and researcher specializing in the secret geometry of Gothic cathedrals. His work focuses on medieval grid systems, the science of Gothic builders, and the geometric symbolism of sacred architecture.
Published Books
- Les cathédrales retracées — The Science of the Builders. 196 pages, ISBN 978-2-9546143-1-1, €35
- In the Layouts of Notre-Dame — 128 pages, ISBN 978-2-9546143-3-5, €35
- The Keys to Vézelay — A Geometric Tour of the Basilica. 50 pages, ISBN 978-2-9546143-2-8, €15
Media References
- Le Bonhomme Picard & L’Observateur de Beauvais (February 6, 2019) — Full interview: “An Investigation into Cathedrals — Pierre Bellenguez Examines Notre-Dame Cathedral”
- RCF Vaucluse (2025) — Les Midis de RCF Vaucluse, with Jean-Michel Mathonière
- Arcana — Les Mystères du Monde (YouTube) — Video dedicated to the geometry of Gothic cathedrals
- Cathédraloscope (Dol de Bretagne) — 140×295 cm panel dedicated to Gothic geometric patterns
- Lomonosov Moscow State University — Citations in the Faculty of Arts’ scientific journal, No. 3/4 2020
- Charles University (Prague) — Citations in academic works
What the experts say
- “Pierre Bellenguez’s demonstration is absolutely remarkable in its simplicity and effectiveness. It surpasses even that of the great Viollet-le-Duc.”—
David Orbach, Architect, instructor at the Université Populaire de Caen (Michel Onfray) - “An extraordinary work in which the lines are functional, for everything begins—regardless of the sketch—with a square line.”
—Jean-Pierre Bourcier, Line Specialist - “Without succumbing to esoteric speculation, the author provides insights that are immediately understandable and crystal clear.”—
Jean-Michel Mathonière, Editorial Director at Éditions Dervy, historian of guilds - “A richly illustrated volume that is a must-read.”—
Olivier Petit, Medievalist
Areas of Expertise
Gothic architecture, cathedral geometry, Villard de Honnecourt, Gothic guide lines, the golden ratio, Notre-Dame de Paris, Vézelay Basilica.
Online Profiles
Comments
David Orbach (Architecte - Ingénieur structure - Enseignant à l’Université Populaire de Caen de Michel Onfray)
Jean-Michel Mathonière - Directeur éditorial chez Éditions Dervy - Historien des compagnonnages
Cathédraloscope
Site : lescathedrales.wordpress.com
Jean-Pierre Bourcier - Spécialiste du trait
Olivier Petit - Médiéviste
Jean-François Lecompte - écrivain
Luciano Xavier - Maquettiste en cathédrales gothiques
Arcana Les Mystères du Monde - Youtubeur (Chaine Arcana)
troph38
Jean-François Lecompte - écrivain
John Brown
Armand Priest (ESTP) - Commentaire Facebook
Anthony CRESTIN - La géométrie et le mythe
Joël Supéry
Asso Fermat-Science
M. Moldovan
Catherine Leschenne




Dominique Gury