SMS Hannover[lower-alpha 1] ("His Majesty's Ship Hannover") was the second of five Deutschland-class pre-dreadnoughts of the German Imperial Navy (Kaiserliche Marine). Hannover and the three subsequently constructed ships differed slightly from the lead ship Deutschland in their propulsion systems and slightly thicker armor. Hannover was laid down in November 1904, launched in May 1905, and commissioned into the High Seas Fleet in October 1907.