Jonathon Keats is asking people to hide cameras around Berlin. Each of his specially designed "photographic time capsules" will slowly record an image over the next hundred years. If all goes according to plan, "future viewers of the images will be able to see urban development and decay over the span of a century captured in single frames." The exhibition is scheduled for May 16th, 2114.
Tautology isn't just a good idea, it's also the law. From the "Berkeley Sure Is Nutty" Department: "In a philosophical effort to come up with a city law that no one could ever break, conceptual artist Jonathon Keats wants Berkeley to legally acknowledge Aristotle's law, commonly expressed as A=A."