Ein feste Burg ist unser Gott (Our God is a secure fortress), BWV 80 is a church cantata based on Martin Luther's that Bach composed for Reformation Day around the year 1723. This movement Aria and Chorale is the second movement of the cantata. The Euphonium/Trombone part performs the bass solo and the Trumpet 1 part performs the Soprano/Oboe solo which is the Chorale itself in an embellished style of the melody. Justin Bland has done a superb job of arranging this beautiful movement of about 4.5 minutes in length for moderately advanced performers. Instrumentation is: Trumpet 1 (C and B-flat parts are provided), Trumpet 2/Flugelhorn in B-flat, Horn, Euphonium/Trombone in bass clef and Tuba.?