The Donnybrook Fair was a traditional Irish fair held in the village of Donnybrook, Dublin. It originated in the 12th century and became famous for its lively atmosphere, featuring various stalls, livestock trading, and entertainment. The fair was known for its rowdy nature, often leading to brawls, which contributed to its reputation. The fair was officially discontinued in 1855 due to concerns over public safety and disorder. Today, the term "Donnybrook" is often used to describe a chaotic or tumultuous situation. The legacy of the fair continues to influence Irish culture and folklore.