A friend introduced me to the works of Sergei Mikhailovich Prokudin-Gorskii, photogrpaher to the last Tsar of Russia. Thanks to Sergei's unique method of exposing three filtered negatives images (creating RGB color composition) it was possible to reconstruct his images into full color photographs that are about 100 (!!!) years old. This is the oldest case I am aware of that such a reconstitution of three negatives into color images was successfully accomplished.
Looking into the eyes of people that walked the earth 100 years ago is incredible, and the fact that Sergei was a great photographer (apropos our discussions of composition...) makes the entire experience a truly magical one.
PS. The kids in the photo are Jewish children from Samarkand photographed in 1911.