International audience ; Archaeological excavations carried out between March 2009 and January 2011 on the grand-place in Nivelles, by the service of AWaP, have identified several burial zones around the abbey. The exceptional state of preservation of organic materials for sectors 01 and 03 allowed a multidisciplinary study of the site (anthropology, carpology, parasitology, bioarchaeology, dendrology, etc.) under the supervision of the archaeologists. The results of this research will be published in a monograph edited by M.-L. Van Hove and D. Willems. The dendrochronological analysis was carried out on a hundred wooden planks from different types of funerary devices: containers (coffins, boxes) and/or supports (funerary beds), their function being not clear in all cases. The amount of samples and the quality of the preserved wood provided data for several issues including dating, dendroprovenancing, description of the trees’ growth environment(s) and a technical examination of the artefacts. Results of this investigation offer stimulating perspectives for understanding the organisation and skills of the craftsmen. In addition, the excavated artefacts from Nivelles gave our work a novelty since they led to the construction of a site chronology which represents a considerable step for the dendrochronology of beech (Fagus sylvatica L.) in Belgium and neighbouring countries, this species being known to be difficult for dendrochronology and still little studied in Europe. ; Les fouilles archéologiques menées entre mars 2009 et janvier 2011 sur la grand-place de Nivelles, par le service de l’archéologie de l’AWaP, ont mis au jour plusieurs zones d’inhumation autour de l’abbaye. L’état de conservation exceptionnel des matériaux organiques dans deux secteurs en particulier (01 et 03) a permis une étude approfondie et multidisciplinaire du site (anthropologie, carpologie, parasitologie, archéobiologie, dendrologie, etc.) sous la houlette des archéologues. Les résultats de ces investigations seront publiés dans une ...