 Chorale fantasia

Chorale fantasia is a type of large composition based on a chorale melody, both works for organ, and vocal settings, for example the opening movements of Bach's chorale cantatas, with the chorale melody as a cantus firmus.Chorale fantasias first appeared in the 17th century in the works of North German composers such as Heinrich Scheidemann and Franz Tunder (who, however, rarely used the term).