Antique print titled 'Prospectus arcis Fridericoburgensis (\.)'. View on Frederiksborg Castle, in Hillerød, Denmark. This is an optical print, also called 'vue optique' or 'vue d'optique', which were made to be viewed through a Zograscope, or other devices of convex lens and mirrors, all of which produced an optical illusion of depth. Published, circa 1760. Frame included. We carefully pack our framed items to ensure safe shipping.