With the Florentine cosmographer Paolo Toscanelli he collaborated in astronomy, a close science to geography at that time, and produced a small Latin work on geography, "Descriptio urbis Romae" ("The Panorama of the City of Rome").
Med manjšimi študijami je bila, pionirska na tem področju, razprava o kriptografiji "De componendis cifris" in prva italijanska slovnica.