While doing research at the Library of Congress, I stumbled upon this extraordinary collection of richly colored photographs taken in Europe, the Middle East and in North America between 1890 and 1910. The 6000 amazing photolithographs in the catalog come from collections of the Photoglob Company, Zurich and the Detroit Publishing Company.
This set of photographs, and dozens more, can be found on the Library of Congress website Prints & Photographs Online Catalog * the LOC website seems to be down today*
Hardanger Fjord, Norway
Algiers
Bordeaux
Lake Lucerne
Ghent
Riga, Latvia
Stallhein, Norway
Warsaw
.
Travel Between The Pages 
pretty amazing!
What were you researching in the Library of Congress? I used to work in a small research library. Nothing beats the serendipitous discovery of things like these pictures. It sparks something deep inside that, while undefinable, is nonetheless necessary.
I especially liked the photos of Hardanger Fjord, Algiers, Riga. Now I’m very curious about “photochrom” and why it was ever abandoned? Two other thoughts: (1) do we really think Photoshop is any better?; and (2) did you notice how wide the street in Algiers is and how few people there are in the photo? That same scene today would be congested with gears and tennis shoes.