A Russian historian; his first work was "Letters of a Russian Traveller," in 6 vols., published in 1797-1801, which gained him a high reputation, and it was followed by his "History of Russia," in 12 vols., published in 1816-1829, for the materials of which he had access, to the most authentic documents as imperial historiographer, an office to which he was appointed in 1803, and the work is a work in the highest repute (1766-1826).