University of Pennsylvania Library's Ms Codex 1881 - Astronomical treatises and tables
From Albert Kohn
An astronomical compendium that contains texts, diagrams, and tables related to the computation of the relative positions of the celestial bodies. Written in Germany in 1481, it is a paper codex with texts that include the Theorica planetarum, attributed to Gerard of Cremona (c. 1114–1187), and the Tractatus de sphaera by the astronomer John of Sacro Bosco (c. 1195– c. 1256). It also includes a complete set of Alphonsine Tables.