[2] The main focus of the book is on the architect (a master mason) and the construction process, such as transport of materials, laying of foundations, erection of walls and vaulting.

It also discusses the relationships between architects and patrons, the organization of craftsmen's guilds, the development of written contracts, the transition from wood to stone construction, the use of architectural drawings, et cetera.

The list of "Thirty-One Great Cathedrals" includes eleven English buildings, seven in France, three in Germany and Central Europe, five in Italy and five in Spain.

Body text Documents The French medievalist Jacques Le Goff called Quand les cathédrales étaient peintes "an excellent essay".

"[5] The Australian historian of religion Carole Cusack also gave a positive review in her article for Parergon: "This lavishly illustrated small volume is a delight.