The American Museum of Natural History has culled together their collection of historical photos online in an overwhelming library that documents their exhibits, dinosaur displays and dioramas from construction to completion. This is all part of their online exhibit, titled Picturing the Museum: Education and Exhibition at the American Museum of Natural History. They note that the "exhibitions within the Museum building grew from the simple rows of specimen cabinets to more sophisticated representations of the natural world, both living and extinct." [Pruned via Kottke]