Ahh...wasn’t Salieri also involved with the Vienna School once?
Salieri ran a musical gym for Schubert, handing him opera libretti from his private library and giving him homework assignments to set those words to music.
Schubert and those others who were allowed to study with Salieri addressed him as "Grandfather". It was quite a privilege, and the students who studied with Salieri were a small but happy family.