Erhardt Ratdolt's Euclid's Elements of Geometry (1482), a dazzling white-on-black design brackets the text, and incredible fine line diagrams in the wide margin visually define Euclid's terms.This is an interesting page on Ratdolt. Here the borders and initials are used as design elements. Pictor (Bernard Mahler) is supposed to be the designer. But ornamentation aside, Ratdolt is still aware that geometry is the main design here.