Most of us probably don’t know who Albet Kahn is, but we should. An early Twentieth Century millionaire, he dispatched photographers around the world to shoot color autochromes, a record of who we were then. If you scroll through the images there, take a look at the photo out of Montenegro – that’s not a crack in the picture frame, that’s a crack in the picture. This was shot on a glass plate, not the flexible piece of film most of us remember.
The BBC produced a 10-part series on these images last year (and, yes, you can order it online for about $30) (and, yes, I just did).
(Thanks to Christian Fuchs for the link.)