 One week after the final decision was made to authorize construction of Blücher , the German naval attache obtained the actual details of the new British ships , called the Invincible class . In fact , HMS Invincible carried eight 30 @.@ 5 cm ( 12 @.@ 0 in ) guns of the same type mounted on battleships . It was soon recognized that these ships were a new type of warship , which eventually came to be classified as the battlecruiser . When the details of the Invincible class came to light , it was too late to redesign Blücher , and there were no funds for a redesign , so work proceeded as scheduled . Blücher was therefore arguably obsolete even before her construction started , and was rapidly surpassed by the German Navy 's battlecruisers , of which the first ( Von der Tann ) was ordered in 1907 . Despite this , Blücher was typically deployed with the German battlecruiser squadron . The ship ultimately cost the German government 28 @,@ 532 @,@ 000 Goldmarks . 
