Composed by Gregorio Allegri around 1638 for the Sistine Chapel during Holy Week, Miserere mei, Deus is a celebrated 9-voice Renaissance polyphonic setting of Psalm 51. It was famously guarded by the Vatican until 14-year-old Mozart transcribed it from memory after one hearing in 1770.
Key Aspects of the Miserere:
Structure: It features two choirs (one 4-voice, one 5-voice) performing a blend of plainsong and elaborate polyphony.
The "Forbidden" Piece: For over a century, the work was forbidden to be copied outside the Vatican to maintain its mystique.
Famous Transcription: Mozart's 1770 transcription allowed the work to be published, famously earning him recognition for his musical genius.
Performance: It is known for its intense emotional quality, often featuring a high "C" sung by a boy treble.
The piece is widely regarded as a masterpiece of the stile antico (old style) and a cornerstone of Lenten music.