Mozart and Salieri collaboration composition found
A composition by Wolfgang Amadeus Mozart that was only known because it was mentioned in Koechel's catalog (K 477a) has been found back in Prague.
It is an aria written for English soprano Nancy Storace on a text by Lorenzo da Ponte. More remarkably, the composition is a combined effort of both Mozart and Antonio Salieri. Otherwise than often thought, Mozart and Salieri were no enemies of each other.