What's the oldest movie in your collection?

Mine is The Astronomer's Dream (1898) that's included on Flicker Alley's blu-ray of A Trip to the Moon (1902). If you don't consider a 3 minute runtime to be a movie, then it's Dante's Inferno (1911) with its 68 minute runtime. I love how it feels like I've traveled back in time when I'm watching really old films. What's your oldest?