The Library of Congress contains a digitized record of the “Turkestan Album.” It was commissioned by the first governor of Russian Turkestan—none other than the conqueror, General Konstantin Petrovich Von Kaufman.
The Turkestanskii Al’bom (Turkestan Album) provides a visual survey of Central Asia from the perspective of the Russian imperial government that took control of the area in the 1850s and 1860s. About 1,200 photographs, with some architectural plans, watercolor drawings, and maps, are arranged in four parts.
It can be found here: http://www.loc.gov/rr/print/coll/287_turkestan.html
It contains many photos of interest to the gamer of this period. The “historical part” focuses on Russian military activities with battle maps and portraits of soldiers involved between 1853 and 1871.