Leçon d'histoire et d'architecture autour de l'un des joyaux de l'art baroque, rêvé par ses occupants successifs comme la vitrine de la puissance de l'Empire autrichien finissant.

It is the world's most mysterious manuscript. A book, written by an unknown author, illustrated with pictures that are as bizarre as they are puzzling - and written in a language that even the best cryptographers have been unable to decode.