The "Aix Annunciation", dating from 1443–1445, is now generally accepted as being by Barthélemy. It is a triptych, now dispersed between Aix-en-Provence, Brussels, Amsterdam and Rotterdam (one of the side-panels having been cut into two pieces). It was commissioned by a cloth-merchant who knew Barthélemy's stepfather , and combines influences from the Early Netherlandish art of Robert Campin and Jan van Eyck with those of Claus Sluter who worked at Dijon, and Colantonio from Naples (although some see this last influence as flowing in the other direction). Many of the iconographic details follow those from Annunciations by Jan van Eyck and his circle, such as the Washington "Annunciation". Together with a fine portrait dated 1456 (Lichtenstein Collection, Vienna), and a fragment with a small crucified Christ in the Louvre, this is the only surviving panel painting associated with him; most of his later works are illuminated manuscripts commissioned by René of Anjou.