Jeanne Demessieux has produced a dozen wonderful preludes based on Gregorian chant themes. The pieces contain fairly simple pedal parts and are in a variety of styles.
Rorate Coeli – Choral orné
Adeste Fideles – Musette
Attende Domine – Choral Paraphrase
Stabat Mater – Cantabile
Vexilla Regis Prelude
Hosanna Filio David – Choral fugue
O Filii – Variations
Veni Creator – Toccata
Ubi Caritas – Ricercare
In Manus Tuas – Litanie
Tu es Petrus – Marcia
Domine Jesu – Berceuse