Main (Thompson) Library location: South wing -- Sixth window. The name and mark of Gian Giacomo de Legnano (c.14-- – c. 15--) first appear in Milan circa 1480. De Legnano shared a printing press with his brothers at the Sign of the Angel and printed books regularly in both Milan and Pavia until 1533. Throughout their prolific career, the brothers published primarily classical and secular literature. De Legnano himself is responsible for printing several volumes of the works of scholars including Felinus Sandeus, Alessandro Tartagni, and Lanfranco da Oriano. The mark of de Legnano in the Vassar Library presents a large monogram composed primarily of the letters I.O.L., the initials of both the printer himself and his brothers, within an M, representative of Milan. A thick line extending upward from the monogram bisects a small X, forming the initials of Jesus Christ. In the full printing device, this mark would have been surmounted by an encircled I.H.S., another version of the initials of Christ. The entire mark would then appear on an escutcheon supported by a large angel.