The bomb attack of 7 August 1932 in Rennes was aimed at a work by the sculptor Jean Boucher, symbolizing the union of Brittany and France, and placed in a niche in Rennes City Hall. Since its inauguration in 1911, the statue, representing Anne of Brittany, had been considered degrading by the Breton movement, due to its kneeling position before the King of France.
Its symbolic setting was the festivities marking the 400th anniversary of Brittany's union with France, which took place in Vannes on the same day. The first attack committed by the Breton movement, it was also the first action of the armed group Gwenn ha Du. It was carried out by Célestin Lainé, who supplied the bomb, and André Geffroy, who planted it.