Ecclesiastical tradition further ascribes to Gregory the compilation of an Antiphonary, the revision and rearrangement of the system of church music, and the foundation of the Roman schola cantorum.
But it has by recent researches been clearly established that the celebrated Schola salernitana was a purely secular institution.
Charles invited him to France soon after his accession to the throne, probably in the year 843, and placed him at the head of the court school (schola palatina).
The Schola Cantorum, directed by Mr Millard and accompanied by a string quartet and the organ were next to appear.
He sang in the Schola Cantorum of Oxford for two years and performs regularly with the early music vocal ensemble Stile Antico.