12 in HMS Dreadnought in 1906, a comparison with the similarly revolutionary HMS Queen Elizabeth (1915 - photo nearby). The fighting top was clearly misplaced and much hindered by funnel smoke, because its supporting mast anchored the hoist to the Admiral’s pinnace. Odd priorities! She was the only battleship ever to sink a submarine (by ramming - 1915).
HMS Howe, 14 in King George V class battleship, built to Washington Treaty limits. Sisters HMS Prince of Wales (participant in the Bismarck saga and sunk by the Japanese in and HMS Duke of York (victor over the German battleship Scharnhorst in
15 in battleship Bismarck - probably the most famous capital ship of WW2, though her operational career in May 1941 lasted less than a week. Her remorseless hunting down by an avenging Royal Navy after the destruction of iconic battlecruiser HMS Hood is one of the great naval sagas of all time.