Lucia di Lammermoor is an opera composed by Gaetano Donizetti, first performed in 1835. The story is based on the novel "The Bride of Lammermoor" by Sir Walter Scott and is set in 17th-century Scotland. It follows the tragic tale of Lucia, a young woman forced to marry a man she does not love, leading to heartbreak and madness. The opera is renowned for its beautiful arias and dramatic moments, particularly Lucia's famous mad scene, where she descends into insanity after the death of her true love, Edgardo. The themes of love, betrayal, and family honor are central to the narrative, making it a staple in the operatic repertoire.