La Sfera

La Sfera is a composition of four books pertaining to the introduction of basic uses of geography, astrology and cosmology. Filiberto Segatto determined that La Sfera was written between the early fifteenth century and Dati's death in 1435 because there is a 1403 codex in the library of the University of Pavia. However, it is argued that it may have been written and unfinished at the time of Dati's death due to later copies adding more. - Wikipedia