The occasion for the composition of Mozart’s Missa longa is still a matter of speculation, but the Mass remains an exceptional work with its elaborate choral writing, extended orchestration and dramatic changes. The symphonic qualities of the Coronation Mass reveal influences from Mozart’s travels in Paris and Mannheim, as well as a move towards a more operatic style—the memorable soprano solo of the Agnus Dei clearly anticipates the aria ‘Dove sono’ from Le nozze di Figaro. The richness and variety of this work ensures that it has deservedly remained one of Mozart’s most frequently performed Masses.