Georg Böhm wrote three settings of the chorale Vater unser im Himmelreich. This past weekend at the Cathedral of Mary Our Queen, I played the first one as prelude. With a rhythmic repeated chord accompaniment and ornamented solo presentation of the melody, it has inspired many of my improvisations.
The other two settings could also be models for improvisations, though the last is much more complicated. The second setting is a duo while the last one presents each phrase of the chorale in quasi-fugal imitation.