The Missa Sanctissimae Trinitatis was probably composed within a few weeks in the late fall of 1736, an occasion for the composition is not recorded. With this mass, the first in a series of five late masses, Jan Dismas Zelenka entered upon the phase of his masterful late works. Its spacious conception abundant in numbers, stylistic and compositional wealth, as well as its vehement, musical expressive power clearly differentiate this work from Zelenka’s previous masses.