Friedrich Freiherr von der Trenck (February 1726– 25 July 1794) was a Prussian officer, adventurer, and author.
In 1746, von der Trenck escaped from the fortress of Glatz (Kłodzko). Then, in 1749, he obtained an employment as Rittmeister of an imperial cuirassier regiment in Hungary. In 1753, he went to Danzig for family reasons, but was again captured, on the orders of Frederick II, and was sent to the "Sternschanze" (literally: Star-shaped Redoubt) in Magdeburg. To prevent him from attempting to escape, they fastened his hands, feet, and body with heavy chains and manacles. In 1763, he was released through the intervention of Empress Maria Theresa.
During the next ten years, von der Trenck led an active life. He busied himself in writing literature, running a wine trading business, and travelling to England and France.
By the order of Austria, von der Trenck was sent, as an observer of the events of the French Revolution, to Paris, where he was accused as a spy and executed by the guillotine in 1794, two days before the fall of Robespierre and the end of the Terror.
In 2003, ZDF broadcast a two-part series Trenck = Zwei Herzen gegen dir Krone. The leading roles were played by Ben Becker and Alexandra Maria Lara..
His life was also the basis of the novel Trenck by Bruno Frank