539368 Camera Obscura, illustrration from \'Athanasius Kircher Ars Magna\', Amsterdam, 1671 (engraving) by Dutch School, (17th century); Private Collection; (add.info.: a darkened box with a convex lens or aperture for projecting the image of an external object on to a screen inside, a forerunner of the modern camera.); Universal History Archive/UIG; Dutch, out of copyright.