[4] Information from several sources places him at the cathedral school in Rheims in the 980s,[5] where one of his fellow students was the future King Robert II (the Pious) of France.

[9] There is some dispute over Fulbert's sainthood, which arises from his contemporaries describing him as having a "saintly nature", a description which continued to be used by others after his death.

Fulbert was never officially canonized by the Church, but permission was given by Rome for the dioceses of Chartres and Poitiers to celebrate his life on 10 April.

He also wrote to fellow churchmen on a variety of liturgical issues including the appointment of bishops, excommunication, and obedience.

His letters also include correspondence about mundane issues of everyday life such as thanking people for medicine and setting up meetings.

These letters provide insight into a variety of issues in the late tenth and early eleventh century France.

[17] Fulbert's most famous sermon is “ Approbate Consuetudinis”, in which he provides information regarding the importance of the celebration of the “Feast of Mary’s Nativity”.

The results were twofold, it helped to ease people's fears and greatly expanded the Marian Cult and Chartres's position in it.

[23] To gain popular support for this feast, Fulbert wrote his famous sermon “Approbate Consuetudinis” in which he relates Mary's miracles.

[26] During his time in Chartres Fulbert played an important role in the development and spread of the ideas that led to the Gregorian church reforms of the eleventh century under Pope Gregory VII.

In the eleventh century the secular rulers had a habit of appointing whomever they wanted to fill vacant church positions.

[27] After Chartres Cathedral burned in 1020, Fulbert devoted his energies to raising funds for its rebuilding, which was completed in 1037, nine years after his death.