The Danish ironclad Dannebrog was an armored frigate of the Royal Danish Navy. She was built as a sailing 72-gun ship of the line, but was reconstructed into a steam-powered ironclad in the early 1860s. She had an uneventful career before the ship was stricken from the Navy List in 1875. The ship was converted into an accommodation ship that same year and served until she became a target ship in 1896. Dannebrog was broken up in 1897.