The SMS Lützow was the second Derfflinger class battlecruiser built by the German Kaiserliche Marine (English: Imperial Navy) before World War I. Ordered as a replacement for the old protected cruiser Kaiserin Augusta, Lützow was launched on 29 November 1913, but not completed until 1916. Lützow was a sister ship to Derfflinger from which she differed slightly in that she was armed with an additional pair of 15 cm (5.9 inch) secondary guns and had an additional watertight compartment in her hull. She was named in honor of the Prussian general Ludwig Adolf Wilhelm von Lützow who fought in the Napoleonic Wars.
During the Battle of Jutland, Lützow sank the British battlecruiser HMS Invincible and is sometimes given credit for sinking the armored cruiser HMS Defense. However, she was heavily damaged by an estimated 24 heavy-caliber shell hits. With her bow thoroughly flooded, the ship was unable to make the return voyage to Germany; her crew was evacuated and she was sunk by torpedoes fired by one of her escorts, the torpedo boat G38.
