NotePlayMusicAt age fourteen, Mozart walked out of the Sistine Chapel and wrote down Gregorio Allegri’s closely guarded nine-voice Miserere entirely from memory.
Eine kleine Nachtmusik, K. 525 — Opening Mannheim rocket fanfare
Mozart outlines the G major tonic triad (G–D–G–B–D) and the D7 dominant chord with crisp, unmistakable symmetry.
The five-year-old composer and his sister Nannerl
Born in Salzburg in January 1756, Wolfgang Amadeus Mozart grew up listening to his father Leopold teach keyboard lessons to his older sister Maria Anna (“Nannerl”), herself a brilliant harpsichordist and fortepianist. By age four Wolfgang was learning pieces from Nannerl’s notebook in half an hour; by age five he was inventing little minuets and allegros that Leopold wrote down in amazement.
Between 1762 and 1773, the Mozart family spent years on bumpy stagecoach tours across Munich, Vienna, Paris, London, and Italy. Young Wolfgang improvised fugues, sight-read manuscripts at first glance, and absorbed every regional musical dialect in Europe.
Transcribing the Vatican’s secret nine-voice choir piece at age 14
In April 1770, during Holy Week in Rome, the 14-year-old Mozart attended Wednesday service in the Sistine Chapel to hear Gregorio Allegri’s Miserere—a haunting piece for two choirs (five voices and four voices) whose score the papal choir guarded closely against copying.
As Leopold Mozart proudly wrote home to Salzburg that week, Wolfgang walked back to their lodgings after a single hearing and wrote the entire multi-voice polyphonic score down from memory, returning on Good Friday with the manuscript tucked inside his hat only to check a few tiny details.
626 works before age 36
Moving to Vienna in 1781 as one of history’s first freelance virtuoso composers, Mozart poured out music at a staggering pace: operas like The Marriage of Figaro, Don Giovanni, and The Magic Flute; 27 piano concertos; 41 symphonies; string quartets dedicated to his friend Joseph Haydn; and sparkling keyboard variations—including his famous Twelve Variations on the French melody we know today as “Twinkle, Twinkle, Little Star” (K. 265).
When he died in December 1791 at just 35 years old, leaving his Requiem in D minor (K. 626) unfinished on his desk, he had written more than 600 cataloged works—nearly twenty hours of music for every year of his adult life.
Tonic and dominant: the engine of Mozart’s clarity
Look at the first four bars of Eine kleine Nachtmusik above: Bars 1–2 outline the G major tonic triad (G–B–D, the “home” chord, I), and Bars 3–4 answer by outlining the D dominant seventh chord (D–F♯–A–C, V7). That crystal-clear call and response between Tonic (I) and Dominant (V) is why Mozart’s melodies feel balanced from the very first bar.
Historical sources & references
- Leopold Mozart, Letter from Rome to Anna Maria Mozart (14 April 1770): Firsthand account of 14-year-old Wolfgang writing down Allegri’s Miserere after hearing it in the Sistine Chapel.
- Nannerl Notenbuch (1759–c. 1764, Internationale Stiftung Mozarteum Salzburg): Manuscript notebook containing Leopold Mozart’s annotations on five-year-old Wolfgang’s earliest pieces (K. 1a–1f).