As in every edition of the collection Mirabilia Italiae, the Photographic Map is the heart of the work.
More than a thousand colored photographs give life to a guided tour inside the Chapel which touches each surface, especially those that would be difficult to observe in a true tour. Each numbered image with a caption is put in a scheme which identifies the position in the Chapel. In this way it is always possible to know where to find the image and with the number find it in the relative Report volume.