Caption:
Ancient wall outlines: Mountain fortress wall I, wall with arches and columns II, and Rustic wall structure III. Copied from Sebastiano Serlio's Libro Quarto (Regole). Copperplate engraving by Johann Franck from Joachim von Sandrarts LAcademia Todesca, della Architectura, Scultura & Pittura, oder Teutsche Academie, der Edlen Bau- Bild- und Mahlerey-Kunste, German Academy of Architecture, Sculpture and Painting, Jacob von Sandrart, Nuremberg, 1675.