Vitse-admiral Popov was a monitor built for the Imperial Russian Navy in the 1870s. It was one of the most unusual warships ever constructed, and still survives in popular naval myth as one of the worst warships ever built. The hull was circular to reduce draught while allowing the ship to carry much more armour and a heavier armament than other ships of the same size. Vitse-admiral Popov played a minor role in the Russo-Turkish War of 1877–78 and was reclassified as a coast-defence ironclad in 1892. The ship was decommissioned in 1903 and sold for scrap in 1911.