I recently heard a live performance of the Passacaglia from one of the Rosenkrantz Sonatas by Heinrich Ignaz Franz Biber (1644-1704). The fifteen Rosenkrantz Sonatas are scored for violin and basso continuo. However, each sonata closes with a Passacaglia for unaccompanied violin.
The systematic imaginative use of the patterned variations in Biber’s Passacaglia are thought to have inspired Bach to compose his solo Violin Sonatas.
Enjoy this recording of Biber's Passacaglia in G minor performed by violinist, Reinhard Goebel.