Antique print titled 'Siege et Prise de la Ville de Nice (\.)'. Original antique optical print of the siege of Nice, France. The optical views, also called views, perspectives or "mondo nuovo" prints are very popular between the late 18th and early 19th century. They were meant to be viewed through a set of several mirrors or by means of a Zygrascope instrument consisting of a mirror and a lens. The optical views can be considered the precursors of three-dimensional images and stereoscopes that were very successful in the 19th century. Published by J. Chereau, circa 1790.