What is known as Abel Gance's landmark film?

Abel Gance is best known for his pioneering work in cinema, particularly for the film "Napoleon," which he directed in 1927. This film is recognized as a landmark due to its innovative techniques and grand scale. Gance utilized a variety of cinematic methods that were groundbreaking for the silent film era, including rapid editing, superimpositions, and an early use of a multi-screen process called Polyvision, which projected three images side by side for an epic effect.

The ambitious narrative of "Napoleon" combines historical drama with rich visual storytelling, elevating the film as a profound artistic achievement. Gance's film influenced many filmmakers who followed, solidifying its place in film history and the evolution of cinematic techniques.

In contrast, the other films listed, such as "Intolerance" by D.W. Griffith, "The Birth of a Nation" (also by Griffith), and "Metropolis" by Fritz Lang, while significant in their own right, do not embody Gance's unique contributions to film as "Napoleon" does. Each of these films has made its mark in cinematic history, but they are not directly associated with Abel Gance's innovations.