The Christmas Novena is a treasured part of Vincentian life. Carlo Antonio Vacchetta either composed or revised it to encourage the Marchesa of Caluso’s piety; its first recorded appearance was in 1720 at the Vincentian church in Turin. It underwent revisions in the twentieth century. The novena’s traditional form is: invitatory, prophecies, canticle, lesson, hymn, antiphons for the Magnificat, Magnificat, and collect and dismissal. The traditional text is given with its biblical or liturgical sources. The 1969 English translation by David E. Windsor and Rory P. Cooney is printed alongside it.