Several years ago I took a tour of the Niels Bohr Library & Archives and the Center for History of Physics at the American Institute of Physics. It is supported by donations from the Friends of the AIP Center for History of Physics and by an endowment from Rosa Segrè.
The collection has more than 30,000 historical digital images,
photographs, slides, lithographs, engravings, drawings and other visual
materials. The collection is richest in portraits and snapshots of
modern American physicists, astronomers and geophysicists but includes
many other scientists as well as photos and illustrations of
laboratories, telescopes, accelerators and other instruments, objects
One of the coolest things? The collection of physicists riding bicycles. No, really!