En tibi lector Robertum Valturium ... De re militari libris XII
A 1532 Paris edition of Roberto Valturio's Latin treatise on military art in twelve books, printed by Christian Wechel and aimed at scholars and commanders. Its pictures are crisp black-line woodcuts of siege engines, towers and artillery set on bare ground, with clean outlines and little shading, offering a designer a model of early mechanical drawing and fortification structure.











