Around 1905, Prokudin-Gorsky envisioned and formulated a plan to use the emerging technological advances that had been made in color photography to document the Russian Empire systematically. Through such an ambitious project, his ultimate goal was to educate the schoolchildren of Russia with his "optical color projections" of the vast and diverse history, culture, and modernization of the empire.
In 2004, the Library of Congress contracted with computer scientist Blaise AgŁera y Arcas to produce an automated color composite of each of the 1902 negatives from the high-resolution digital images of the glass-plate negatives. He applied algorithms to compensate for the differences between the exposures and prepared color composites of all the negatives in the collection. As the library offers the high-resolution images of the negatives freely on the Internet, many others have since created their own color representations of the photos, and they have become a favourite testbed for computer scientists.[link]
These are some of my renderings of said negatives.