The Deutschland class was a group of five pre-dreadnought battleships built for the German Kaiserliche Marine, the last vessels of that type to be built in Germany. The class comprised Deutschland, the lead ship, Hannover, Pommern, Schlesien, and Schleswig-Holstein. The ships closely resembled those of the preceding Braunschweig class, but with stronger armor and a rearranged secondary battery. Built between 1903 and 1908, they were completed after the launch of the revolutionary British all-big-gun battleship HMS Dreadnought in 1906. As a result, they were obsolescent before entering service. The ships nevertheless saw extensive service in the High Seas Fleet, Germany's primary naval formation, through the late 1900s and early 1910s, when they were used for training, which included overseas cruises.

SMS Schlesien was one of five Deutschland-class pre-dreadnought battleships built for the German Kaiserliche Marine between 1904 and 1906. Named after the German province of Silesia, Schlesien was laid down at the Schichau-Werke shipyard in Danzig on 19 November 1904, launched on 28 May 1906, and commissioned on 5 May 1908. She was armed with a battery of four 28 cm (11 in) guns and had a top speed of 18 knots. The ships of her class were already outdated by the time they entered service, as they were inferior in size, armor, firepower, and speed to the revolutionary new British battleship HMS Dreadnought.