
Johann Sebastian Bach
| BWV | 80 | 
| Title | A mighty fortress is our God | 
| Composed | 31st October 1723, Leipzig | 
| Scoring | Choir 
          for 4 voices  | 
    
| Movements | Choir: 
        A mighty fortress is our God Aria (Soprano): All that which of God is fathered Recitative (Bass): Consider well, O child of God Aria (Soprano): Come in my heart's abode Chorale: And were the world with devils filled Recitative (Tenor): So stand then under Christ's own bloodstained flag Duetto (Alto, Tenor): How blessed though are Chorale: That word they must allow to stand  | 
    
| Category | Spiritual Cantata | 
| Event | Reformation Sunday | 
| Author of text | Salomo Franck 1715 Martin Luther 1528/29 | 
| Text Choir: Soprano, Alto, Tenor, Bass Oboe I + II Violin I + II Viola Violoncello Violone Basso continuo (Cantus firmus in Oboe I + II) Aria: Soprano solo, Bass solo Oboe Violin I + II Viola Basso continuo Recitative: Bass solo Basso continuo Aria: Soprano solo Basso continuo Chorale: Soprano, Alto, Tenor, Bass Oboe I + II Violin I + II Viola Taille Basso continuo Recitative: Tenor solo Basso continuo Duetto: Alto solo, Tenor solo Oboe da caccia Violin Basso continuo Chorale: Soprano, Alto, Tenor, Bass (Instruments unknown)  | 
      
 Consider 
          well, O child of God, this love so mighty,  | 
    
| Epistle | 2 Thessalonians 2: 3-8  | 
    
| Gospel | Revelations 14: 6-8  | 
    
| Bibletext | 1. 1 John 5:4 | 
| Manuscript | Library of Congress, Washington;Singing Academy, Berlin; Music library, Leipzig; University library; Warzawa |