The generally accepte cause of the death of Adolf Hitler on Monday, 30 April 1945 is suicide by gunshot and cyanide poisoning. The dual method and other circumstances surrounding the event encouraged rumours that Adolf Hitler may have survived the end of World War II along with speculation about what happened to his remains. The 1993 opening of records kept by the Russian KGB and FSB confirmed the widely accepted version of Hitler's death as described by Hugh Trevor-Roper in his book The Last Days of Hitler published in 1947. However, the Russian archives did show what happened to the cadaver.