"Threnody (Lament)" is a musical composition by Polish composer Krzysztof Penderecki, created in 1960. The piece is written for 52 string instruments and is known for its intense emotional expression, reflecting themes of grief and mourning. It was originally composed as a tribute to the victims of the Hiroshima atomic bombing. The work is characterized by its innovative use of sound, employing techniques such as extended string techniques and dissonance. "Threnody" has gained recognition for its powerful impact and has been featured in various films and performances, solidifying its place in contemporary classical music.