Image from Lorenz Stoer's Geometria et Perspectiva (1567), a book of illustrations of fantastical landscapes populated by polyhedrons amid ruins and strapwork constructions. The title page — the only text to be found in the work — explains the puzzling images: they are said to be useful to artists working in the field of wood inlay, or marquetry. (Source: Eberhard Karls Universität Tübingen, CC-BY SA)