Article révisé par les pairs
Résumé : The article reveals how much the relation towards miraculous images varied between the secular chapter, later the abbey of canons, at Waltham on the one hand and the Benedictine abbey of Glastonbury on the other. At the end of the twelfth century the monks of Glastonbury erected crosses and a statue of the Virgin as miraculous images to compensate for a loss of prestige and solemnity. On the other hand the secular, later regular, canons of Waltham considered the large stone cross which was venerated there to be their principal raison d'être. Most of the article is devoted to the exceptional story of the cross and proposes a new interpretation especially of the "chronicle" of Waltham (a little after 1177).