This exhibit brings together diagrams from a copy of Johannes de Sacrobosco's De sphaera mundi (On the Sphere of the World) in a manuscript at the University of Pennsylvania (Penn), MS Codex 1881, with annotations, transcriptions, and other contextual information. It is a work in progress, so if you would like to contribute more information about these diagrams, please fill out the feedback form.
|The Spheres||The Circles||The Climes|
|Volvelles and Rotating Diagrams|
|The Spheres||The Horizon|