Alma Deutscher on Instagram: "Nine years ago, my sister Helen and I had an incredible privilege: We got to play both of Mozart’s violins! Helen played his childhood violin —kept behind glass in his birthplace and almost never touched. And I played his adult violin — the one he used to perform his violin concertos. I don’t think anyone had ever played them together before. It was unforgettable. The duet we’re playing is by… Mozart. Thank you to the Mozarteum and Mozart's Birthplace in Salzburg!"