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Beautiful interpretation of this 13th-century Christian hymn to Mary – Stabat Mater – by Giavanni Battista Pergolesi in the Chapelle de la Trinité, Château de Fontainebleau, France.
Pergolesi is an Italian Baroque composer, violinist, and organist, best-known for his sacred music such as Stabat Mater, and the opera La serva padrona (The Maid Turned Mistress). He died of tuberculosis at the age of 26.
More on Pergolesi on Wikipedia.