« De sphaera et definitione sphaerae » : traité de géométrie et d'astronomie.
A 1601 French treatise on geometry and astronomy, with its sphere-related text in Latin, held in a manuscript reserve collection. Its pages show engraved baroque ornament: cornucopias, scrolled cartouches, grotesque masks and acanthus borders, plus a diagram of two overlapping circles. A designer could draw on these for ornamental frames, decorative dividers and classical scroll motifs.
