Ambrose and Gregory the Great, who are known for their contributions to the formulation of Gregorian chant, are credited with 'antiphonaries', collections of works suitable for antiphon, which are still used in the Roman Catholic Church today.
Goussainville was the first to express (1685) a doubt as to the authenticity of the Gregorian antiphonary.
Gregory was also asked by emperor Louis’s representative, Amalarius of Metz, to provide an Antiphonary for use at church services at Metz, to which Gregory was forced to admit that he had none suitable for the emperor, as he had already given a number to Wala of Corbie, which he had already taken to Francia.