Ioannis de Sacrobusto libellus de sphæra. : accessit eiusdem autoris computus ecclesiasticus, et alia quædam in studiosorum gratiam edita. : cum præfatione Philippi Melanthonis
Ioannis de Sacrobusto's Libellus de sphaera, a 1549 Latin astronomy textbook printed at Wittenberg by Vitus Creuzer with a preface by Philipp Melanchthon, written for students of the sphere and calendar. Its pictures are simple woodcut diagrams of concentric orbits, planetary paths and star positions, offering a designer clean geometric schematics with strong circles, radiating lines and small star bursts.
