The Emir of Bukhara in a 1911 color photograph by Sergei Mikhailovich Prokudin-Gorskii. At right is the triple color-filtered black-and-white glass plate negative, shown here as a positive. – Wikipedia
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The Emir of Bukhara in a 1911 color photograph by Sergei Mikhailovich Prokudin-Gorskii. At right is the triple color-filtered black-and-white glass plate negative, shown here as a positive. – Wikipedia
The Artists' Sanctum 
