We present one of the earliest examples of animated books, or pop-up books, that we came across while cataloguing our antique collection. It is a cinquecentina, printed in Lyon in 1567, containing the De Sphaera of the astronomer and mathematician Giovanni Sacrobosco (John of Holywood or Holybush), the most widely read treatise on astronomy in the Middle Ages, especially at the universities. The volume contains numerous three-dimensional illustrations depicting the solar system, intended to extend and complete the author's discussion.
In the image, taken from one of the pages of the volume, you can see a reproduction of a lunar revolver, an instrument that allowed the phase, age, and constellation of the moon to be determined. This instrument, composed of several overlapping paper discs, was fixed to the page below by a pin, which allowed each disc to rotate freely around the central axis.
[from: ABiGOC: Archivio e Biblioteca Generali dell’Ordine Carmelitano]
