This monograph offers a comprehensive technical account of the salvage operation of the steamer Gneisenau, conducted by the engineering firm Dyckerhoff & Widmann in the 1915-1917 period. It contains detailed photographic documentation paired with descriptive commentary elucidating the preparatory measures - such as re-orienting the listing vessel - the structural calculations for lifting frameworks, hydraulic jacks, and cylinder systems, and the sequential steps culminating in the vessel's transfer to dry dock on May 23, 1917. As a corporate monograph, it balances technically precise explanations of maritime recovery processes with illustrative visuals, thus holding significance for historians of engineering, maritime archaeology, and WWI logistics. Dyckerhoff & Widmann A.G.: Founded in the 19th century, Dyckerhoff & Widmann became one of Germany?s leading civil engineering firms. Specializing in large-scale infrastructure, waterworks, and maritime engineering, the firm earned renown for innovative techniques in concrete construction, tunneling, and salvage operations. This monograph appears within their promotional archive, exemplifying their technical prowess during World War I.