1. University of Pennsylvania, LJS 216 DS ID: DS136 Title: Sphaera mundi Author: Johannes de Sacrobosco Place: Paris and France Date: [between 1256 and 1270]
2. University of Pennsylvania, LJS 494 DS ID: DS728 Title: Sphaera mundi Author: Johannes de Sacrobosco Place: Italy Date: [between 1425 and 1450]