This composer's second symphony is now attributed to his father Leopold.
This composer's second symphony is now attributed to his father Leopold. As a child he travelled around Europe performing with his sister "Nanerl" and this man memorized and transcribed Allegri's Miserere by listening to it once. This composer's fortieth symphony is the "great g minor" and his forty-first and last is the Jupiter symphony.  His works are classified with Kochel numbers, and this composer of Eine kleine Nachtmusik died while working on his Requiem. For 10 points, name this Austrian composer who was apocryphally poisoned by Salieri.
This composer's second symphony is now attributed to his father Leopold.
Wolfgang Amadeus {Mozart}