"Die Abenteuer des Prinzen Achmed, aka The Adventures of Prince Achmed, (1926): directed by Lotte Reiniger and Carl Koch, with the collaboration of Berthold Bartosch and Walter Ruttmann, based on the character Prince Ahmed, from the book 1001 Arabian Nights."
"It is the oldest surviving feature-length animated film, and it featured a silhouette animation technique Reiniger had invented..."
I would have had to post about ten images from this movie to give you an idea of how brilliant it is; it must be seen. Now it has been made possible by Videos with Bibi.
This video is unfortunately no longer available. You have to be quick when things like this comes along!
Stephen of ASIFA wrote to remind us of these articles:
Reiniger's Adventures of Prince Achmed Part One
Reiniger's Adventures of Prince Achmed Part Two