In the last few years hundreds of pieces of parchment and paper from Utrecht University LIbrary and the Utrecht Archives have been examined. The research gave spectacular results: for instance, there was the discovery of the only known manuscript of a text which reaches back to the Christian theologian Novatianus. And medieval compositions never listened to before were found. This research is described in the book Perkament in stukken ('Parchment to pieces'). An exhibition related to the book can be visited in the Utrecht Archives from 21 September onwards.