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Primary sourceBookcompleted 1749

Mass in B minor

Johann Sebastian Bach · completed 1749

Bach's large-scale Latin setting of the Mass, completed near the end of his life and drawing on decades of earlier music.

This late, monumental work represents Bach's summation of sacred music, compiled from decades of his own writing.

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Handwritten manuscript page of orchestral and choral score in brown ink on aged paper, with the heading 'Symbolum Nicenum' at top. Multiple staves for voices and instruments, with Latin text 'Credo in unum Deum' written under the notes.
Johann Sebastian Bach, Mass in B minor, BWV 232, first page of the Credo, Berlin State Library.

About this source

What it is

The Mass in B minor, BWV 232, is a complete setting of the Latin Mass ordinary by Johann Sebastian Bach, completed in 1749. Much of it reuses earlier material, including a Sanctus from 1724, while some sections, like the Credo's 'Et incarnatus est', were newly written. Bach's own manuscript is held at the Berlin State Library.

Why it matters

As a Lutheran composer writing a full Catholic Mass, Bach was doing something unusual for his time. Scholars think he may have intended it for a grand occasion, though it was likely never performed complete in his lifetime. It shows his effort late in life to gather and preserve some of his finest vocal writing.

Look closer

  • Why might a Lutheran composer write a complete Catholic Mass?
  • What clues in the manuscript show that Bach reused older music for a new purpose?
  • Why do you think this work became popular only long after Bach's death?

This book is part of the curated material that grounds the AI version of Johann Sebastian Bach on Humy.ai — when students ask about related events, the AI can quote it and cite it.

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