Passacaglia is a type polyphonic variations.
In pasacalle - majestic work of nature is the theme does not change. She slowly and majestically sounds at the very bottom, the bass voice, while in the upper voices emerge and develop new independent melodies.
Pasacalle wrote many composers of the seventeenth and eighteenth centuries, including I. S. Bach. In our time, to the ancient form of pasacalle often turned D. D. Shostakovich (for example, in the fourth part of the Eighth Symphony, the third part of the First violin Concerto).
D. Shostakovich. Symphony No. 8 (c-moll Op.65.
Part 4. Largo