Avstriaca sidera heliocyclia astronomicis hypothesibvs jlligata
Avstriaca sidera heliocyclia is a 1633 astronomy treatise by Charles Malapert, printed at Douai by the Belleri workshop, aimed at scholars of early modern astronomy. Its pictures are geometric diagrams of nested circles, chords, and lettered points drawn in plain black line on cream paper, offering a designer clean, precise linework for orbital or radial motifs.
