Movies that changed cinema

[Reasonable]

The Ghost of RubangB said:

A Trip to the Moon (1902, Georges Méliès, France)
The Great Train Robbery (1903, Edwin S. Porter, USA)
The Cabinet of Dr. Caligari (1920, Robert Wiene, Germany)
The Battleship Potemkin (1925, Sergei Eisenstein, USSR)
Man With a Movie Camera (1929, Dziga Vertov, USSR)
Un Chien Andalou (1929, Luis Buñuel, France)
M (1932, Fritz Lang, Germany)
Night of the Hunter (1955, Charles Laughton, USA)
La Jetée (1962, Chris Marker, France)
Night of the Living Dead (1968, George A. Romero, USA)
Eraserhead (1977, David Lynch, USA)
DAICON IV (1983, DAICON Film, Japan)

Now that's a good list. 

I'd also add Orphee as well.  What about Birth of a Nation?  I know not very PC but nonetheless pretty influential.

I'd also add 2001 because you've got to have one Kubrick film in there.  Oh, and Thief of Bagdad.

No Citizen Kane?  What about The Third Man?

Nice to see Night of the Hunter there.  I love the composition and lighting in that, not to mention Mitcham's performance.

EDIT: Metropolis, Snow White & The Seven Dwarves, Jaws and Toy Story.  Oh and Blade Runner.