Joseph Haydn's Stabat Mater Hob. XXa:1 was written in 1767, for soprano, alto, tenor and bass soloists, mixed choir, 2 oboes both doubling English horn in the sections in E-flat major, strings and organ continuo. The first performance is believed to have taken place March 25, 1768 in Vienna with soloists Anna Maria Scheffstoss and Carl Friberth, with Haydn conducting from the harpsichord. Conductor Jonathan Green suggests adding a bassoon to double the bass line and perhaps just one player to each string part.
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