Eugene-Emmanuel Viollet-le-Duc (1814-1879) is one of the most famous French historians of art and architecture. An architect and engineer, restorer and teacher, historian and publicist, he gained fame for his tireless work in the field of survey, conservation and restoration of architectural monuments of the Middle Ages. For Viollet-le-Duc, an architectural building is an integral organism, the external forms of which are a natural reflection of its internal device, which, in turn, ideally strives to solve the given practical problem in the simplest and most rational way. The lessons he attempts to draw from the experience of medieval art directly anticipate the architectural theory and practice of the subsequent modern era, on which he had a significant influence. “In the work that we present to the reader, we have tried not only to provide an overview of the various forms of architecture of the Middle Ages in chronological order, but also to substantiate the reasons for the emergence of these forms, the principles of their use, the customs and mores among which they originated” - this is what Viollele-Duc wrote about the book that you are holding in your hands. Contents: E.E. Viollet-le-Duc and his bookIntroductionArchivoltsBastionWimpergMilitary architecturePalaceHouseDonjonCastleCapellaButtressMachiculiMonastic architectureRib, pointed archReligious architectureGirth archCathedralTranseptTriforiumTumeauChorusIndex