Bach Mass Bmin BWV232 - Early version - Latin Vocal Score. Several movements of what was later called the Mass in B were preceded by early versions; the Kyrie- Gloria Mass of 1733, the early G major version of the Credo rediscovered a few years ago in Gotha as well as the Sanctus of 1724. All of these shed interesting light on the history of this great masterpiece. For example the brief " Credo " invocation differs from the later version in it's choice of key and more.