The third volume of Mozart’s Masses focuses on works written in Salzburg when the composer was in his late teens and early twenties. The Missa in honorem Sanctissimae Trinitatis, a bright celebratory work, is the only Mass setting without soloists that Mozart composed. The Missa Brevis in D major is a compact, economic setting conforming to the Archbishop’s dictates for shorter works. Its companion, the Missa Brevis in B flat major, though keenly responsive and beautiful, upset church musicians because it utilised a Parisian gavotte in the ‘Dona nobis pacem’ and ended Mozart’s employment on a provocative note. Volume 1 in the series is on 8.574270, Volume 2 is on 8.574417.