Anton Theden (born 13 September 1714 in Steinbeck, Mecklenburg; died 21 October 1797 in Berlin), was Surgeon-General of the Prussian Army and personal doctor to Frederick the Great, a medical researcher, alchemist, and a leading freemason and rosicrucian. He was also influential in bringing Russian Freemasonry under the Control of Prussian lodges, through which he exerted diplomatic influence.