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- Megalethoscope Slide, "Benediction of the Pope from St. Peter's on Easter Sunday" - Invented by Carlo Ponti in the early 1860s, a megalethoscope is a device used to view a translucent, multilayered photograph. By opening or closing various panels, a person saw the image change. When lit from behind, pinpricks and paint or colored tissue applied to the back or a secondary layer of the photograph transform the scene to reveal hidden images and create an illusion of nighttime.
- Collections - Artifact
Megalethoscope Slide, "Benediction of the Pope from St. Peter's on Easter Sunday"
Invented by Carlo Ponti in the early 1860s, a megalethoscope is a device used to view a translucent, multilayered photograph. By opening or closing various panels, a person saw the image change. When lit from behind, pinpricks and paint or colored tissue applied to the back or a secondary layer of the photograph transform the scene to reveal hidden images and create an illusion of nighttime.