The Library of Congress' website is down until Monday, it seems, but if you Google "LOC color photos of Russia" you'll find several links to color photographs of Russia made in the late 1800's using a tri-color process. Digital technology (which can be useful, after all) allowed the Library to scan all three single-color images then very accurately combine the three layers. (I read all this long ago, so I hope I'm remembering correctly.) It's wonderful to see a world that we normally only see in b/w images as being as fully of color as our own.