HMS Sans Pareil was a Victoria-class battleship of the British Royal Navy of the Victorian era, her only sister ship being HMS Victoria. In deciding upon her design configuration the Board of Admiralty took what history shows was a retrograde step by requesting the reversion from barbettes to turrets for her main armament. She was completed slightly later than her sister-ship and was hence the last British battleship ever to be equipped with her main armament mounted in a single turret. Sans Pareil was the last battleship to be designed by Nathaniel Barnaby.