Os Justi (“The mouth of the righteous”)

Os Justi (“The mouth of the righteous”), WAB 30, is a sacred motet composed by Anton Bruckner in 1879. Os justi is a Gregorian chant used as gradual of the Commune Doctorum, and as introit I and graduel II of the Commune Confessoris non Pontificis.

Instrumentation:

• 2 Trumpets in B♭
• 2 French Horns
• 2 Trombones
• Bass Trombone
• Tuba