Libroni 1–3 were digitized by the DIAMM mobile imaging service (except for the spine, top and edges of Librone 1 and 3, digitized by the Archive of the Veneranda Fabbrica).

As it was impossible, for conservation reasons, to photograph anew the fragments of Librone [4], the Archive staff scanned the printed b/w photographs of the 1950s campaign (the glass plates too are preserved at the Archive, but they are less well contrasted, and therefore less legible, than the prints).

Fragments 3bis-1 and 3bis-2 were digitized by the Archive of the Veneranda Fabbrica.

All pictures were subsequently converted to 300 dpi JPEG files, trimmed in order to improve the ‘book view’ in Mirador, and provided with the Veneranda Fabbrica copyright notice.