Sphaera Ioannis de Sacro Bosco emendata. : cum additionibus in margine, & indice rerum & locorum memorabilium, & familiarissimis scholijs,
Sphaera is a 1567 Latin astronomy textbook by Johannes de Sacrobosco, edited by Francesco Giuntini and printed at Lyon by the heirs of Jacques Junta for university students of cosmography. Its woodcut diagrams show celestial spheres, star-studded globes, a horizon-based sky dome, and compass-labelled meridian circles, offering a designer clean, schematic geometric linework and early astronomical iconography.
