Hendrik Vanden Abeele, artistic director of chant group Psallentes, embarks on a project in which he will walk you through each and every page of a 1481 antiphonary from Ghent (B-Gu Ms 15). This is the opening movie. For this project, Hendrik uses pictures that he made himself. However, you can see the whole of the manuscript via this link (pdf): http://search.ugent.be/meercat/x/view/rug01/000781999 (and click the full text link on the bottom of the page).
Alternatively, go to http://lib.ugent.be, enter “Antiphonarium Sint-Baafsabdij” as a search term. This will bring you to the same link given before. This is the presentation video in which Hendrik Vanden Abeele explains his project: