The "Missa" in D minor, published here, the third of Haydn's six late masses, was written during the summer of 1798 between the two late oratorios. According to the date given on Haydn's autograph score he completed the composition in less than eight weeks. The score bears no particular title, but in Haydn's manuscript thematic catalog of his works referred to as "Missa in Angustiis".