The Works of Giuseppe Verdi is the first critical edition of the composer's oeuvre. Together with his operas, the series presents his songs, his choral music and sacred pieces, and his string quartet and other instrumental works.

This edition of Messa da Requiem is based on Verdi's autograph score and other original sources. The appendices include two pieces from the compositional history of the Requiem an early version of the Libera me, composed in 1869 as part of a collaborative work planned as a memorial to Rossini; and the Liber scriptus, which in the...