Olli Kortekangas composed Missa silvestris (2018) for mezzo-soprano, male choir and organ to a Swedish text by Göran Stenius (1909-2000), a Finnish poet, writer and diplomat. The "Mass of the Forest" follows the catholic mass with a pantheistic approach.

1. Antifon (a cappella)
2. Introitus (tutti)
3. Invitatio ad penitentiam (choir, organ)
4. Confiteor (mezzosoprano, organ)
5. Kyrie (choir, organ)
6. Gloria (choir, organ)
7. Oratio universalis (a cappella)
8. Credo (tutti)