The Astronomicum Caesarium (“The Emperor’s Astronomy,” 1540) by Petrus Apianus is a monumental example of European book arts of the sixteenth century, and one of the most beautiful books ever produced.
The author and producer, Peter Bienewitz (1495–1552), was the son of a shoemaker. He took the name Apianus (Latin for “bee man,” more or less a translation of his German surname), while a student at the University of Leipzig. Apianus worked as a mathematician and cosmographer (and astrologer) in the employ of emperor Charles V (1500–1558), whom he may have tutored. The Astronomicum Caesarium was produced for the emperor in folio format (about 18 x 13 in.) in a limited edition (about forty copies survive but the original run might not have been much larger).