I have not seen any mentions of this on the forum, so I thought I would share this here. A string trio by Mozart was just rediscovered a few days ago, titled "Serenata ex C - Ganz Kleine Nachtmusik", composed sometime in the 1760s. Here's a score video of one of the new performances: https://www.youtube.com/watch?v=HzmRRIIlGTo
I think this is hopeful news that we may one day be able to uncover other major works by Mozart thought to be lost forever, such as the Trumpet Concerto and the Cello Concerto.
I'm sorry - I think this is too early to conform to our guidelines:
https://www.unsungcomposers.com/forum/index.php/topic,3681.0.html