The Gunpowder Plot
In 1605, thirteen young men planned to blow up the Houses of Parliament (the Gunpowder plot). Among them was Guy Fawkes, Britain’s most notorious traitor.
Bonfire Night
Every year, on November 5th, British people celebrate Guy Fawkes’ failure to kill the king, James I. They light bonfires, set off fireworks, and burn an effigy of Guy Fawkes.
More information in English : http://www.bonfirenight.net
and in French : https://fr.wikipedia.org/wiki/Guy_Fawkes
The mask representing the rebellious Guy Fawkes was adopted by the Anonymous