HMS Northumberland (1866)
 HMS Northumberland was the last of the three Minotaur-class armoured frigates built for the Royal Navy during the 1860s. She had a different armour scheme and heavier armament than her sister ships and was generally regarded as a half-sister to the other ships of the class. The ship spent her career with the Channel Fleet and occasionally served as a flagship. Northumberland was placed in reserve in 1890 and became a training ship in 1898.