The icon on glass, more precisely the icon painted on the back of the glass, is a category of folk art, a genre of folk art practiced almost exclusively in Transylvania and which must be related to some influences from Central Europe. Through this communication, we set out to research, in more detail, a part of the collection of cult objects – icons on glass, bringing to the public’s attention some data about several items of this collection. From this category of heritage, the collection of Dr. Nicolae Minovici Museum of Folk Art counts about 30 icons on glass, made in Transylvania and being dated in the period between the XVIII–XIX centuries. They were made in the two great Transylvanian workshops, Șcheii Brașovului (20 icons) and the one from Nicula (10 icons). The work is structured in two parts; the first part includes some general data about icons, iconography, the appearance of the icon on glass and iconographic centers in our country, especially in Transylvania, where the objects from the museum’s collection were made. The second part includes a series of iconographic representations on glass from the museum’s patrimony, accompanied by descriptions, information on the workshop, craftsmen and technical data.