In 741, Charles Martel died, and in this year the most important phase of Boniface's career started, with Lullus as his closest assistant.

Moreover, a study by Michael Tangl, cited by Theodor Schieffer, suggests that Boniface, whose eyesight had begun to fail him early in the 740s, may have used Lullus's services in reading and writing the letters that were such an important part of his work.

Lullus's chief accomplishment was the completion of Saint Boniface's reform of the church in the Frankish Carolingian Empire and the successful conclusion of the Christianization of the Germans in Hesse-Thuringia.

[6] The Vita Lulli, written by Lampert of Hersfeld (probably between 1063 and 1073) led to Lullus being venerated as a saint[7] and becoming the main patron of the abbey along with Wigbert.

Founded more than 1,275 years ago, the city still reveres Saint Lullus, who left Malmesbury in the 730s on a mission to convert the German tribes to Christianity.