Dictionnaire raisonné de l'architecture française du XIe au XVIe siècle
Viollet-le-Duc's Dictionnaire raisonné de l'architecture française, published in Paris in 1854, is a dictionary of French medieval architecture from the 11th to 16th centuries, written by the architect and theorist Eugène-Emmanuel Viollet-le-Duc for students and practising builders. Its plates are technical line drawings of structure and ornament, with plans, elevations and sections drawn in measured, precise linework. A designer could draw on their clean grid-based geometry, hatched shading and rows of small repeated motifs for diagrams and architectural graphics.
