Polyvision
Sign in to savethumb|right|300px|A triptych scene of Napoléon (1927), showing its two vertical seams. Polyvision was the name given by the French film critic Émile Vuillermoz to a specialized widescreen film format devised exclusively for the filming and projection of Abel Gance's 1927 film Napoléon, its three-projector format predating Cinerama by 25 years.