"•Grzegorz Gerwazy Gorczycki's (c. 1666-1734) Missa Rorate is a composition destined for vocal performance by soloists and four-part choir. • The work’s score, lacking all the vocal elements necessary for a High Mass, compelled the composer to furnish some original parts. Completorium is the last hour of the day, said before resting. • The Completorium is festive in nature, i.e. sung to close holiday celebrations. • The soloist and choir are accompanied by an instrumental ensemble, adding much splendor."