Etliche vnderricht, zu befestigung der Stett, Schlosz, vnd flecken
Albrecht Dürer's 1527 treatise on fortification, printed in Nuremberg for military engineers and town builders, presents its argument through woodcut plans of bastions, walls and ground layouts. The pictures are black-and-white linework of geometric star-shaped and circular plans with hatched shading, set among dense German blackletter text; a designer could borrow their radiating diagrammatic grid, hatching patterns and plan-view clarity for maps or architectural schematics.
