Kalendarium
Kalendarium is an incunable astronomical and calendrical treatise by Regiomontanus (1436-1476), printed in Venice by Erhard Ratdolt, aimed at scholars and astronomers of the late fifteenth century. The pictures are crisp woodcut diagrams of sundials, a moon-phase instrument with a central sun engraving, and eclipse charts with red and black disks, offering a designer clean geometric linework, radiating sun motifs, and early printed tabular layouts.
