The Vitrum digital library presents a selection of classical works on the history of glass. Realized with the aim of making entirely available for online consultation, for the first time, the earliest treatises on the processing of glass published in modern times, as well as some fundamental studies on the history of glass, Vitrum represents a small digital encyclopedia, which illustrates the scientific and technological revolution that accompanied the use of glass starting from Antiquity. To this selection has been added a digital reproduction of the famous work by Tommaso Piroli, Antichità di Ercolano, Rome, 1789-1807, a fascinating description of the places of origin of most of the glasswork displayed.