A fortress sure is God our King

Tune

EIN FESTE BURG

The original rhythms of EIN FESTE BURG (see 469) had already reached their familiar isorhythmic (all equal rhythms) shape by the time of Johann S. Bach (PHH 7) in the eighteenth century. The harmonization is taken from his Cantata 80. Many organ and choral works are based on this chorale, including…

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