Britannica AI Icon
verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Feedback
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Thank you for your feedback

Our editors will review what you’ve submitted and determine whether to revise the article.

Brennus (flourished 4th century bc) was the chief of the Senones, who in 390 or 387 bc annihilated a Roman army, occupied and plundered Rome, and exacted a heavy ransom before withdrawing. He is famous for his reputed saying, “Vae victis” (“Woe to the vanquished”). The name, which is not found in the best sources, may be invented.

This article was most recently revised and updated by Encyclopaedia Britannica.