Georg Elser

Johann Georg Elser; 4 January 1903 – 9 April 1945) was a German worker who planned and carried out an elaborate assassination attempt on Adolf Hitler and other high-ranking Nazi leaders on 8 November 1939 at the Bürgerbräukeller in Munich. Elser constructed and placed a bomb near the platform from which Hitler was to deliver a speech. It did not kill Hitler, who left earlier than expected, but it did kill 8 people and injured 62 others. Elser was held as a prisoner for more than five years until he was executed at the Dachau concentration camp less than a month before the surrender of Nazi Germany.

Source: Wikipedia