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St Isaac's Square in St. Petersburg, Russia is a major city square sprawling between Marie Palace and St. Isaac's Cathedral, which separates it from Decembrists Square. The square is dominated by the equestrian Monument to Nicholas I.

This photochrom from the 1890s displays a view of the square from the dome of St. Isaac's Cathedral towards Marie Palace. Behind the palace, the capital of the Russian Empire is seen all the way to the Trinity Cathedral.

Photochrome is a colorizing process combining photography and color lithography. It was especially popular in the 1890s, when the technique was used to create a color print from a black and white photo negative, using between four and fourteen lithograph stones, made from rocklike substances, to colorize the print with several different inks.