|Mata Hari was the stage name of Margaretha Geertruida "Grietje" Zelle (7 August 1876, Leeuwarden – 15 October 1917, Vincennes), a Dutch-Frisian exotic dancer and courtesan who was executed by firing squad for espionage during World War I.|
On 13 February, 1917, Mata Hari was arrested in her room at the Hotel Plaza Athénée in Paris. She was put on trial, accused of spying for Germany and consequently causing the deaths of at least 50,000 soldiers. She was found guilty and was executed by firing squad on 15 October, 1917, at the age of 41 at Fort de Vincennes.
Pat Shipman's biography Femme Fatale argues that Mata Hari was never a double agent, speculating that she was used as a scapegoat by the head of French counter-espionage. Georges Ladoux had been responsible for recruiting Mata Hari as a French spy and later was arrested for being a double agent himself. The facts of the case remain vague, because the official case documents regarding the execution were sealed for 100 years.