References of "Van Wersch, Line"
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See detailHéritages antiques dans les mosaïques murales alto-médiévales. Techniques et matériaux du nord-ouest de l'Europe.

Van Wersch, Line ULiege

Scientific conference (2019)

A travers des études de cas issus de sites français, belges et hollandais, datés entre le VIe et le VIIIe siècle, je retracerai les techniques héritées de l'Antiquité et les innovations propres au haut ... [more ▼]

A travers des études de cas issus de sites français, belges et hollandais, datés entre le VIe et le VIIIe siècle, je retracerai les techniques héritées de l'Antiquité et les innovations propres au haut Moyen Âge. Les analyse physico-chimiques entreprises sur les tesselles permettront de mettre en évidence le recyclage de verre antique et la récupération de cubes issus de mosaïques romaines. Cette approche mettra ainsi en évidence la transmission des savoir-faire et la pérennité des objets au-delà des périodes historiques communément admises. [less ▲]

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See detailThe merovingian ceramic in Huy and its region
Van Wersch, Line ULiege

Conference (2019)

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See detailProspection géophysique sur le site de Germignydes- Prés
Camerlynck, Christian; Sapin, Christian; Van Wersch, Line ULiege

in Bulletin du Centre d'Études Médiévales d'Auxerre (2019), Hors-série n°11

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See detailLes matériaux des mosaïques de Germigny-des- Prés
Van Wersch, Line ULiege; Kronz, Andreas; Simon, Klaus et al

in Bulletin du Centre d'Études Médiévales d'Auxerre (2019), Hors-série n°11

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See detailFusion de données lasergrammétriques/photogrammétriques et techniques d'extraction d'information archéologique sur base de nuage de points 3D
Poux, Florent ULiege; Billen, Roland ULiege; Hallot, Pierre ULiege et al

Conference (2018, March 08)

While virtual copies of the real world tend to be created faster than ever in the form of point clouds and derived products, their use by all professionals requires new tools to facilitate the ... [more ▼]

While virtual copies of the real world tend to be created faster than ever in the form of point clouds and derived products, their use by all professionals requires new tools to facilitate the dissemination of knowledge. Digital analyses are changing the way researchers, archaeologists and heritage curators work and collaborate to gradually combine their expertise through a common platform. Nevertheless, the addition of semantic information to complete the point clouds is essential to allow a complete use as reference data. There are few concepts and tools that simplify this process, making it difficult to share analyses. Different methods will be presented to extract archaeological information from the point clouds and create a connection with the structured knowledge in the form of ontology. Classification and structuring procedures for reasoning from the data will be discussed. These methodologies will be illustrated at the Germigny-des-prés (France) and Château de Jehay (Belgium) sites. The communication and 3D visualization tools developed to allow several interactions will also be presented. While the Germigny-des-prés site (France) is almost exclusively dedicated to research, the same is not true for the Jehay site. This exceptional site belongs to the Province of Liège and is managed by a non-profit association. A partnership has been established between this association and the Geomatics Unit of the University of Liège. It concerns not only the acquisition of 3D data but also the support of the association in its archaeological research, site rehabilitation and enhancement projects. Several measurement campaigns were carried out at different stages of the renovation. New missions are planned, notably by students from the University. In addition to several promotional videos and a few derivative products useful for renovation, a virtual reality operation is currently attracting the attention of our developers. Indeed, the Castle is currently largely closed to the public, it is planned this summer to offer virtual reality tours based on lasergrammetric and photogrammetric surveys. In the longer term, it is planned to establish a spatialized information system dedicated to the Castle; the conceptual bases of this system have already been established during a recent study. [less ▲]

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See detailEarly medieval tesserae in northwestern Europe. Long distance trade or local supply?
Van Wersch, Line ULiege

Conference (2018)

In northwestern Europe, between the Merovingian and the Carolingian period, a real shift occurs in craft organization. Artisans left the previous central places and relocated in the countryside, in the ... [more ▼]

In northwestern Europe, between the Merovingian and the Carolingian period, a real shift occurs in craft organization. Artisans left the previous central places and relocated in the countryside, in the monasteries and in the emporia (Henning 2007, Theuws 2007). Considering glass production, it is noticeable that this relocation goes hand by hand with one of main technological modification: the change of flux from soda lime to wood ash (Wedephol et al. 2011). In that regard, architectural glass will be particularly interesting. Indeed, if window glass is among the first to experience recipes transformations (Van Wersch et al. 2016), the tesserae used in the mosaics will long be made with material in the roman tradition (Neri 2016). As Byzantine or Italian buildings, early medieval churches north of the Alps were also decorated with mosaics and small glass cubes have been found in several excavations. These were assembled to compose walls decorations but they were also a source of colored glass. In some workshops, they were fused in order to make other objects, especially window glass as attested by the monk Theophilus (Schibille & Freestone 2013). Written sources also testify for their recycling and their trade around the Mediterranean as well as between Italy and the Carolingian court (Neri 2016). However, up until now, no workshop has been found (James 2017). This paper offers to make an assessment and to draw the role of tesserae in the glass production, especially the one of architectural glass at the beginning of Middle Ages in northwestern Europe. [less ▲]

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See detailWhat about the pottery imported from Eifel to Belgium during the early Middle Ages
de Longueville, Sylvie; Van Wersch, Line ULiege; Annaert, Henrica et al

Conference (2018)

At the transition between Antiquity and Middle Ages, Mayen wares, present as jugs and pots in the graves, testified imports form the Eifel region. Short after, they disappeared and were no longer attested ... [more ▼]

At the transition between Antiquity and Middle Ages, Mayen wares, present as jugs and pots in the graves, testified imports form the Eifel region. Short after, they disappeared and were no longer attested during the 6th c. when regional productions were at their height. From the end of the 7th c. until the beginning of 10th c., new Eifel products were traded into Wallonia/Mosan region. These are mainly high-fired ceramics (Ware MD by M. Redknap) but more rarely also red painted ceramics (Ware MFP) and polished potteries (Ware MB/C). Quantities vary according to the nature of the site: very present in urban centres as well as in abbatial context, they are found only in small quantities in rural settlements. The questions related to their chronology, the means of distribution and the contexts of discovery will be discussed in this paper. [less ▲]

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See detailGermigny-des-Prés, les héritages en question
Van Wersch, Line ULiege; Croutelle, Justine

Conference (2018)

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See detailDe bois, de pierre, de terre…et de verre. Approche de l’approvisionnement des chantiers alto-médiévaux à travers le cas de la mosaïque du baptistère de Nevers.
Van Wersch, Line ULiege; Neri, Elisabetta; Chene, Grégoire ULiege et al

Conference (2018)

Les découvertes de verre architectural qui se sont multipliées ces dernières années lèvent peu à peu le voile sur le rôle joué par de ce matériau dans les édifices alto-médiévaux. Les églises possédaient ... [more ▼]

Les découvertes de verre architectural qui se sont multipliées ces dernières années lèvent peu à peu le voile sur le rôle joué par de ce matériau dans les édifices alto-médiévaux. Les églises possédaient de véritables vitraux et le verre pouvait être incrusté dans les murs et les sols où il jouait un rôle dans la réflexion de la lumière. Dès lors, le besoin croissant de verre architectural a pu contribuer aux innovations techniques dans l’artisanat verrier du nord-ouest de l’Europe ainsi qu’à la mise en place de réseaux d’approvisionnement spécifiques en fonction des chantiers de construction. Attribuées au décor VIe siècle, les tesselles mises au jour lors des fouilles de la cathédrale de Nevers, dans le baptistère, sont un témoignage du début de ce processus. Les cubes sont majoritairement réalisés en verre, opaque et coloré ou incolore et recouvert d’une feuille d’or. Comme certains d’entre eux étaient encore insérés dans du mortier portant des traces de polychromie, leur attribution a une mosaïque pariétale est assurée. L’étude de ces objets et leur analyse en PIXE-PIGE et en raman, nous a permis d’identifier les matières premières et les techniques utilisées pour leur mise en œuvre. La comparaison avec des édifices contemporains a mis en exergue des points communs et les particularismes propres au site de Nevers, nous permettant de proposer une hypothèse pour l’approvisionnement des matériaux nécessaires à la décoration du baptistère. Cette étude révèle ainsi l’importance d’un chantier de mosaïque pariétale et la complexité des relations qu’il demande. [less ▲]

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See detailRecherches récentes sur le site de Germigny-des-Prés (Loiret, France).
Van Wersch, Line ULiege; Hocquet, François-Philippe ULiege; Strivay, David ULiege et al

Conference (2018)

Restauré au XIXe siècle, l'église de Germigny-des-Prés est actuellement la seule au nord des Alpes à abriter des mosaïques alto-médiévales. L’édifice de culte, bâti au début du IXe siècle, faisait partie ... [more ▼]

Restauré au XIXe siècle, l'église de Germigny-des-Prés est actuellement la seule au nord des Alpes à abriter des mosaïques alto-médiévales. L’édifice de culte, bâti au début du IXe siècle, faisait partie de la villa de Théodulphe, proche conseiller de Charlemagne, abbé de Fleury et évêque d’Orléans. Ce site est donc exceptionnel à plus d’un titre. D’une part, l’église est une des plus anciennes de France et, en dépit de restaurations, elle reste un témoignage singulier de l’architecture religieuse alto-médiévale. D’autre part, ses mosaïques nous permettent d’aborder ce type de décoration et plus largement le verre, matériaux rares pour cet époque. Enfin, le site devrait receler les vestiges d’une villa carolingienne dont la réalité matérielle pose encore de nombreuses interrogations. Depuis trois ans, en collaboration avec une équipe internationale, des recherches utilisant des méthodes diverses ont été entreprises. Les mosaïques ont fait l’objet d’un premier examen macroscopique et d’analyses pXRF In situ pour distinguer les parties originales de la restauration du XIXe siècle. 15 échantillons de verre ont ensuite été analysés en EMP-WDS et LA-ICP-MS afin d'identifier leurs matériaux, recettes et provenances. Malgré la restauration plus vaste qu'on ne le pensait auparavant, des parties originales subsistent sur la voûte orientale. Si, des tesselles colorées antiques ont été réutilisés, les cubes couverts d’or et d’argent proviennent d'une production originale. Aucune correspondance n’existant dans le monde italien et byzantin, ils pourraient être issus d’une production spécifique, peut-être régionale. Des prospections géoradars ont été effectuées sur le site afin de localiser de potentiels vestiges alto-médiévaux. Elles ont mis en évidence l’existence de structures en différents emplacements. A l’intérieur du bâtiment, elles ont identifié l’abside occidentale confirmant la restitution du plan original proposé en 1930. A l’extérieur, elles ont permis de détecter les zones sur lesquelles devraient se concentrer les recherches archéologiques. Enfin, un scan 3D a permis un relevé précis du bâtiment. Il sera utilisé pour la gestion de l'information et la visualiser des résultats des recherches que nous espérons poursuivre sur le site de Germigny-des-Prés. [less ▲]

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See detailThe carolingian site of Germigny-des-Prés (Loiret, France), micro and macro-scales methods for the identification of a mosaic production.
Van Wersch, Line ULiege; Hocquet, François-Philippe ULiege; Strivay, David ULiege et al

Poster (2018)

The church of Germigny-des-Prés is one of the oldest in France. It holds the only early medieval mosaics preserved north of the Alps, ordered by Theodulph, close counselor of Charlemagne, at the beginning ... [more ▼]

The church of Germigny-des-Prés is one of the oldest in France. It holds the only early medieval mosaics preserved north of the Alps, ordered by Theodulph, close counselor of Charlemagne, at the beginning of the 9th century AD to decorate the oratory of his villa 1. Restored in the 19th century, it still conserved a part of the original material. These tesserae are a great opportunity to reach the glass from the early Middle Ages, period of change for glass production. Moreover, this site could have hold a mosaic workshop and it could be the first settlement of this type ever discovered 2. In situ, a macroscopic exam and pXRF analyses done on the tesserae from the vault and arches allow to distinguish original material and restored area. 15 glass samples were analysed using EMP-WDS and LA-ICP-MS in order to identify their materials and techniques as well as their origins. A 3D scan of the building makes possible to quantify accurately the materials, to manage the information and to view the results. Finally, ground penetrating radar prospections were done on the site in order to locate a potential workshop. The concentrations of lead, potassium and iron allow us to distinguish the early medieval tesserae from the new ones. Thanks to this, the original part of the mosaic can be precisely differentiated from the restoration of the 19th century that is vaster than previously thought. Still, the figures of the vault appear to be original. The analysed cubes show that some were re-used roman tesserae but the ones with gold and silver, the most numerous in the mosaic of the vault, come from an original production, specific to this site. Structures were found by prospections in different locations around the church and excavations will now take place in order to identify this remains and a potential workshop. Acknowledgements: to the council of Germigny-des-Prés and the DRAC Centre Val-de-Loire for the research authorizations. The missions were financed by the FRS-FNRS, The Comhaire prize of the foundation Roi Baudouin and by ARCHEA. 1 A. Freeman, P. Meyvaert, Gesta (2001), 125- 139. 2 L. James, E. Soproni, B. Bjornholt, in «Mosaics by numbers, (2013), 310-328. [less ▲]

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See detailTransparency in the eight century. Glass at the dawn of a major change
Van Wersch, Line ULiege

in Kars, Mirjam; van Oosten, Roos; Roxburgh, Marcus A. (Eds.) et al Rural Riches & royal rags. Studies on medieval and modern archaeology presented to Frans Theuws (2018)

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See detail3D Point Clouds in Archaeology: Advances in Acquisition, Processing and Knowledge Integration Applied to Quasi-Planar Objects
Poux, Florent ULiege; Neuville, Romain ULiege; Van Wersch, Line ULiege et al

in Geosciences (2017), 7(4), 96

Digital investigations of the real world through point clouds and derivatives are changing how curators, cultural heritage researchers and archaeologists work and collaborate. To progressively aggregate ... [more ▼]

Digital investigations of the real world through point clouds and derivatives are changing how curators, cultural heritage researchers and archaeologists work and collaborate. To progressively aggregate expertise and enhance the working proficiency of all professionals, virtual reconstructions demand adapted tools to facilitate knowledge dissemination. However, to achieve this perceptive level, a point cloud must be semantically rich, retaining relevant information for the end user. In this paper, we review the state of the art of point cloud integration within archaeological applications, giving an overview of 3D technologies for heritage, digital exploitation and case studies showing the assimilation status within 3D GIS. Identified issues and new perspectives are addressed through a knowledge-based point cloud processing framework for multi-sensory data, and illustrated on mosaics and quasi-planar objects. A new acquisition, pre-processing, segmentation and ontology-based classification method on hybrid point clouds from both terrestrial laser scanning and dense image matching is proposed to enable reasoning for information extraction. Experiments in detection and semantic enrichment show promising results of 94% correct semantization. Then, we integrate the metadata in an archaeological smart point cloud data structure allowing spatio-semantic queries related to CIDOC-CRM. Finally, a WebGL prototype is presented that leads to efficient communication between actors by proposing optimal 3D data visualizations as a basis on which interaction can grow. [less ▲]

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See detailDIGITAL INVESTIGATIONS OF AN ARCHAEOLOGICAL SMART POINT CLOUD: A REAL TIME WEB-BASED PLATFORM TO MANAGE THE VISUALISATION OF SEMANTICAL QUERIES
Poux, Florent ULiege; Neuville, Romain ULiege; Hallot, Pierre ULiege et al

in Conservation of Cultural Heritage in the Digital Era (2017, May 16)

While virtual copies of the real world tend to be created faster than ever through point clouds and derivatives, their working proficiency by all professionals’ demands adapted tools to facilitate ... [more ▼]

While virtual copies of the real world tend to be created faster than ever through point clouds and derivatives, their working proficiency by all professionals’ demands adapted tools to facilitate knowledge dissemination. Digital investigations are changing the way cultural heritage researchers, archaeologists, and curators work and collaborate to progressively aggregate expertise through one common platform. In this paper, we present a web application in a WebGL framework accessible on any HTML5-compatible browser. It allows real time point cloud exploration of the mosaics in the Oratory of Germigny-des-Prés, and emphasises the ease of use as well as performances. Our reasoning engine is constructed over a semantically rich point cloud data structure, where metadata has been injected a priori. We developed a tool that directly allows semantic extraction and visualisation of pertinent information for the end users. It leads to efficient communication between actors by proposing optimal 3D viewpoints as a basis on which interactions can grow. [less ▲]

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See detailLa céramique du cimetière mérovingien de Viesville
Van Wersch, Line ULiege

Conference (2017)

La nécropole de Viesville présente de nombreux avantages pour la connaissance de la céramique mérovingienne. Les vases aux contextes de découverte connus sont bien préservés et ont tous été restaurés ... [more ▼]

La nécropole de Viesville présente de nombreux avantages pour la connaissance de la céramique mérovingienne. Les vases aux contextes de découverte connus sont bien préservés et ont tous été restaurés. Leur étude a mis en évidence de nombreuses variantes, dont certaines semblent propres à l’ouest de la Belgique. Les différentes pâtes mettent en exergue la variété des possibilités d’approvisionnement pour la communauté inhumée dans cette nécropole. A côté des produits régionaux, se trouvent des importations dont la sigillée tardive issue des ateliers d’Argonne. Parmi les pots biconiques, des vases issus d’un même atelier ont été repérés et certaines sépultures peuvent ainsi être associées. Sur l’ensemble du site, la céramique permet de définir au moins trois phases chronologiques au cours desquelles l’évolution des pratiques funéraires peut être retracée. [less ▲]

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See detailThe analyses of Merovingian material culture and Sciences
Van Wersch, Line ULiege

Scientific conference (2017)

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See detailThe scientific analyses of glass vessels
Van Wersch, Line ULiege; Biron, Isabelle; Mathis, François et al

in Theuws, F.; Kars, M. (Eds.) The Saint-Servatius complex in Maastricht. The Vrijthof excavations (1969-1970) (2017)

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See detailLa céramique mérovingienne de Viesville (Hainaut, Belgique)
Van Wersch, Line ULiege

Report (2017)

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