The cathedral was built according to the proportions of the golden ratio. If you divide the height of the façade by its width, you roughly obtain the golden ratio. You can also find golden rectangles in the doorframes, except for the central doorway and the second floor, between the main stained-glass window and the two towers.

Laurent Dequick, a professional architect, often showcases buildings and architectural heritage in his photos. Here, he goes further by integrating blueprints of each building, these line drawings that represent all of the proportions of the various dots or lines of a figure. “This is the crux of architecture: between the idea and the construction,” he explains. “It all starts with a line, and from the line form must emerge.” It is the search for the perfect harmony of forms, materials, symbols, and uses.”