The motets Sanctus and Cantate Domino were composed and premiered in Paris in 1995 when Vega was composer-in-residence at Notre-Dame Cathedral. Sanctus is scored for three-voice female or children choir with organ accompaniment. The form of the motet is based in the structure of the traditional prayer, including a textural and harmonic contrast in its second section—Benedictus . Cantate Domino is scored for mixed a capella choir. Both pieces use Gregorian melodies as cantus firmus over which the harmonic discourse is constructed.