The story of Sergey Prokudin-Gorsky, a pioneer of color photography, and his works, which are now the most striking document of Pre-Soviet Russia.The story of Sergey Prokudin-Gorsky, a pioneer of color photography, and his works, which are now the most striking document of Pre-Soviet Russia.The story of Sergey Prokudin-Gorsky, a pioneer of color photography, and his works, which are now the most striking document of Pre-Soviet Russia.