HMS Renown was the lead ship of her class of battlecruisers of the Royal Navy built during the First World War. She was originally laid down as an improved version of the Revenge-class battleships. Her construction was suspended on the outbreak of war on the grounds she would not be ready in a timely manner. Admiral Lord Fisher, upon becoming First Sea Lord, gained approval to restart her construction as a battlecruiser that could be built and enter service quickly. The Director of Naval Construction (DNC), Eustace Tennyson-D'Eyncourt, quickly produced an entirely new design to meet Admiral Lord Fisher's requirements and the builders agreed to deliver the ships in 15 months. They did not quite meet that ambitious goal, but the ship was delivered a few months after the Battle of Jutland in 1916. Renown, and her sister HMS Repulse, were the world's fastest capital ships upon completion.
Renown did not see combat during the war and was reconstructed twice between the wars; the 1920s reconstruction increased her armour protection and made other more minor improvements, while the 1930s reconstruction was much more thorough. The ship frequently conveyed royalty on their foreign tours and served as flagship of the Battlecruiser Squadron when Hood was refitting.
During the Second World War, Renown was involved in the search for the Admiral Graf Spee in 1939, participated in the Norwegian Campaign of April–June 1940 and the search for the German battleship Bismarck in 1941. She spent much of 1940 and 1941 assigned to Force H at Gibraltar, escorting convoys and she participated in the inconclusive Battle of Cape Spartivento. Renown was briefly assigned to the Home Fleet and provided cover to several Arctic convoys in early 1942. The ship was transferred back to Force H for Operation Torch and spent much of 1943 refitting or transporting Winston Churchill and his staff to and from various conferences with various Allied leaders. In early 1944, Renown was transferred to the Eastern Fleet in the Indian Ocean where she supported numerous attacks on Japanese-occupied facilities in Indonesia and various island groups in the Indian Ocean. The ship returned to the Home Fleet in early 1945 and was refitted before being placed in reserve after the end of the war. Renown was sold for scrap in 1948.  wiki