This is a photograph by Russian photographer Sergei Mikhailovich Prokudin-Gorskii. He worked for Czar Nicholas II in the early 1900's. He developed a technique for producing colour film slides and with the Czar's support he travelled Russia from 1907 to 1915 capturing the diversity of the Russian Empire. Many of the glass plate negatives of his photographs were bought by the Library of Congress and have been made available in their wonderful exhibition. http://www.loc.gov/exhibits/empire/gorskii.html
It makes me feel like a bumbling idiot to think that over a hundred years ago there was this amazing man who not only worked out a way to produce colour slides but also convinced Nicholas II to give him unconditional support and access to the whole Russian Empire.