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, MS Codex 1881, with annotations, transcriptions, and other contextual information. It is currently under construction. If you have questions or would like to contribute more information about these diagrams, please fill out the feedback form.

Annotated Diagrams
The Spheres The Circles The Climes
Spheres Circles Climes
Volvelles and Rotating Diagrams
The Spheres The Horizon

Spheres

Spheres