The Publication in facsimile of the auto graphic copy of Johann Sebastian Bach’s Mass in A major BWV 234 at the occasion of the Bach Anniversary Year 1985 has been made possible thanks to the generous support of the publishing house which so carefully preserved this precious manuscript in its archives for almost 200 years. The manuscript was acquired long ago by Johann Gottlob Immanuel Breitkopf, the brilliant and dynamic forefather of the publishing house Breitkopf & Härtel, who conducted a pro...