If Bach had written only the Mass in B minor, he would be considered the leading composer of sacred music in the Baroque period. Composed between 1733 and 1749, on the eve of his death, this Great Mass is a musical testament for posterity: the most accomplished synthesis of the aesthetics that Bach mastered to perfection, but also an anthology of his sacred work, with it's perfectly mastered architecture. John Eliot Gardiner delivers a sensitive reading of this pinnacle of Western music, which he has frequented for half a century, with irresistible energy and compelling beauty. The Monteverdi Choir, undoubtedly the best choir in the world, delivers an extraordinary musical performance. This exceptional moment, filmed in the Chapelle Royale at the Château de Versailles, sumptuously captures the majesty of this masterpiece of sacred art.