At the Saliuktin mines. On the outskirts of Samarkand
Photograph by Sergei Prokudin-Gorsky from his series exploring the furthest reaches of the Russian Empire. Prokudin-Gorsky created his images using a pioneering colour separation technique, where three filtered photographs were overlaid to create the colour image. The version shown here is a digital colour composite by Blaise Agüera y Arcas, 2004.