SMS Seydlitz was a 24,988 metric tons (24,593 long tons; 27,545 short tons) battlecruiser of the Imperial German Navy, built in Hamburg. She was ordered in 1910 and commissioned in May 1913, the fourth battlecruiser built for the High Seas Fleet. She was named after Friedrich Wilhelm von Seydlitz, a Prussian general during the reign of King Frederick the Great and the Seven Years' War.