Jean Langlais (1907 - 1991) wrote some 300 pieces for the organ.
In 1962 he published the "Trois Méditations sur la Sainte Trinité : Le Père – Le Fils – Le Saint Esprit".
The three pieces use a combination of Gregorian chants and free themes.
The third piece "Le Saint Esprit" combines several themes, among them the "Pater Noster" and the "Veni Creator"
I use the Urakami sample sets: its disposition is a mixture of Cavaillé-Coll style romantic sounds with Cliquot-Style french baroque sounds, which works very well with modern french music.