What is "gislebertus"

thumb|300px|Last Judgment by Gislebertus in the west tympanum at Autun Cathedral. Gislebertus, Giselbertus or Ghiselbertus, sometimes "of Autun" (flourished in the 12th century), was a French Romanesque sculptor, whose decoration (about 1120-1135) of the Cathedral of Saint Lazare at Autun, France - consisting of numerous doorways, tympanums, and capitals - represents some of the most original work of the period.