Heritage sciences are experiencing a resurgence at UNamur. This field of research—which involves applying techniques and expertise from the exact sciences (physics, chemistry, biology) to study ancient heritage objects—is reinventing itself thanks to the PHOENIX project, led by seven researchers from the Faculties of Science (Department of Physics) and Philosophy and Letters (Departments of History and Classical Languages and Literatures). 

“PHOENIX emerged from the collaboration of several researchers from different backgrounds, yet all driven by the same desire to study the materiality of heritage objects. One notable figure is Julien Colaux, whose predecessor had led the first heritage science projects at UNamur’s Laboratory of Analysis by Nuclear Reactions (LARN). It’s a sort of return to our roots,” recalls Nicolas Ruffini-Ronzani, a researcher in the Department of History, president of the PaTHs Institute, and one of the project’s leaders. 

With PHOENIX, researchers aim to “make” two types of objects speak: ancient coins and medieval parchments (see box). More specifically, their research is guided by three objectives:

• To understand the composition of the artifacts being studied. For the parchments, to identify the animal species (sheep, goat, or calf); and for the coins, to characterize the metal alloy.
• Gain a better understanding of the production and processing workflow. For example, determine which parts of the animal were used in the production of a parchment.
• To propose the most precise dating possible. 

It is in this last objective that the main challenge lies. “We won’t be able to date these objects to within a year,” warns Olivier Deparis, a professor in the Department of Physics and a member of the NISM research institute. “The idea is to provide a time frame that is as precise, if not more so, than that already provided by paleography (the study of ancient scripts) or textual analysis. If we can narrow it down to a quarter-century, that will already be a significant step forward.”

To achieve this, the PHOENIX team uses various non-invasive techniques, in particular infrared and Raman spectroscopy, time-of-flight secondary ion mass spectrometry (ToF-SIMS), and ion beam analysis (IBA). These approaches—which utilize UNamur’s state-of-the-art tools such as the ALTAÏS particle accelerator (see Omalius #36)—provide detailed information on the physicochemical composition of materials, such as the animal origin and ink formulations for parchments or the type of metal alloy for coins. “The use of the exact sciences will enrich our studies and thus allow us to better understand how these objects were produced in the past,” explains Nicolas Ruffini-Ronzani. “Contrary to what one might think, collaboration between the humanities and the exact sciences has a long history, dating back to the 19^th century, and even much earlier in the case of coins.”

These tools will make it possible to examine parchments and coins down to the finest detail, at the pixel level. These in-depth analyses therefore generate a colossal volume of raw data to process. This is where artificial intelligence comes into play to speed up the processing and reveal the information “hidden” in the data, identifying major trends invisible to the naked eye. 

Above all, it will provide a boost in meeting the challenge of dating the objects under study. Dated documents, such as charters, will thus be used as references to test the model’s robustness by comparing the results obtained with already known dates. “If the results are convincing, the technique could be applied to undated documents,” says Nicolas Ruffini-Ronzani. This would represent a significant breakthrough in historical research.

“The use of machine learning methods is not a panacea,” Olivier Deparis qualifies, however. “We wanted to explore it as an open-ended question to assess its benefits.”

PHOENIX could thus herald a new era for heritage sciences, where artificial intelligence—much like the phoenix after which the project is named—opens up new ways to analyze and understand materials from the past.

• Francesca Cecchet (Department of Physics – NISM and NARILIS Institutes)
• Lucas Baseil (Department of Physics – NISM Institute)
• Julien Colaux (Department of Physics – NISM and PaTHs Institutes)
• Olivier Deparis (Department of Physics – NISM, naXys, and PaTHs Institutes)
• Christophe Flament (Department of Classical Languages and Literatures – PaTHs Institute)
• Louise Fauchier (Department of Classical Languages and Literature – PaTHs Institute)
• Laurent Houssiau (Department of Physics – NISM Institute)
• Alexandre Mayer (Department of Physics – NISM and naXys Institutes)
• Giulia Morabito (Department of Physics – NISM and PaTHs Institutes)
• Nicolas Ruffini-Ronzani (Department of History – PaTHs Institute)
• Nicolas Gros (Department of Physics – NISM and PaTHs Institutes)
• Manon Bart (Department of Physics – NISM and naXys Institutes)

The PHOENIX project is funded by the Concerted Research Action (ARC) program from September 2024 to August 2029. It is a continuation of the interdisciplinary Pergamenum21 project, launched in 2014 by the Moretus Plantin University Library (BUMP) under the leadership of Professor Olivier Deparis and dedicated to the scientific study of parchment with a view to improving conservation practices.

Young people from Rochefort showcased the PHOENIX project at the international First Lego League competition, a robotics contest open to students aged 10 to 16. To align with the annual theme focused on new technologies in the field of archaeology, this team from the Rochefort Youth and Culture Center drew inspiration from IBA technology to develop a research game designed to identify the origin of Ancient Greek coins modeled using a 3D printer. Their project caught the jury’s eye and earned them a spot in the national finals, which took place last March. Beyond the competition, this original game will be presented during Family Day at the Malagne Archaeological Park (Rochefort). 

For the MSCA Doctoral Networks 2025 call, 1,616 proposals were submitted and 141 were selected, representing a success rate of 9.6%. In this highly competitive environment, the selection of three projects involving UNamur sends a strong signal: it confirms the scientific excellence of Namur’s teams and their ability to build high-level international partnerships in support of doctoral training and innovation. Six doctoral dissertations will be eligible for funding.

In many neurological diseases, both inflammation of the nervous system and imbalances in the gut microbiota are observed. GlycoAxis aims to go beyond simple correlations by identifying the molecular “messengers” that link the gut, the immune system, and the brain. The project focuses on complex sugars found on the surface of certain bacteria (glycans), which are suspected of playing a key role in immune activation and neuroinflammation. The goal: to better understand these mechanisms and pave the way for new diagnostic tools, imaging techniques, or biomarkers for brain health.

In the face of climate change, pollution, and habitat fragmentation, some ecosystems weather the shocks… while others collapse. ReDiLeep focuses on a key driver of this resilience: response diversity—that is, the fact that different species (or ecological functions) do not all react in the same way to a disturbance. The project aims to better measure and model this mechanism in order to link research more directly to the needs of conservation, restoration, and public policy regarding biodiversity.

Our digital communications rely on light: optical fibers, sensors, and photonic circuits capable of processing information. But with the explosion of data, the rise of AI, and the advent of ever-faster networks, it is becoming crucial to control light dynamically—much faster than is possible with current components, which are often “static.” SPARK is exploring a new approach: combining spatiotemporal metamaterials (nanoscale structures designed to shape light) with light that is itself “structured” in space and time. The result: reconfigurable photonic technologies for computing, imaging, and ultra-fast communications.

Giacomo Lopopolo is studying the effects of oxidative stress caused by radiation therapy and the damage it inflicts on cellular mitochondria, particularly in the treatment of lung cancer. Objective: to determine the necessary doses in treatment plans for conventional radiotherapy or proton therapy to ensure effective treatment while improving the patient’s quality of life. This interdisciplinary project also benefits from the expertise of Professor Thierry Arnould, co-supervisor (URBC). 

For her part, Keïla Openge-Navenge is attempting to decipher the mechanisms of radiation resistance at work in breast, lung, and colorectal cancers, and in particular the role of lipid metabolism, ferroptosis, and mitochondria within cancer cells. 

Jade Nichols, who has just joined UNamur, is launching a Télévie project to understand the response of macrophages—which play an essential role in shaping the tumor microenvironment—to ultra-high-dose-rate (UHDR) radiation, a phenomenon that has not yet been explored and whose results could eventually help optimize treatment strategies that leverage both radiation and the patient’s own immune responses.

Inès Bourriez focuses her research on skin cancers, which account for 40% of all cancers diagnosed today. She is interested in the impact of skin aging and the accumulation of so-called senescent cells on tumor development and progression. 

Understanding how cells react to radiation is also the focus of projects led by Emma Lambert, on the one hand, and Manon Van Den Abbeel, on the other, through a collaboration with Anne-Catherine Heuskin at LARN. Manon Van Den Abbeel is studying the irradiation conditions that induce the strongest possible immune response to circumvent the various immunosuppressive mechanisms developed within tumors, thereby enhancing the immunogenicity of tumors and thus their recognition and destruction by the immune system. 

Emma Lambert, meanwhile, is launching a project on glioblastoma, an aggressive and currently incurable brain tumor, to better understand the resistance mechanisms that develop during combination treatments using chemotherapy, radiation therapy, or proton therapy. 

As for Eloïse Rapport, she is interested in a third form of radiation therapy, using alpha particles—that is, ionized helium atoms—to increase the death of cancer cells within tumors. In particular, she is studying the different forms of induced cell death and their potential immunogenicity. 

Pancreatic cancer, particularly pancreatic ductal adenocarcinoma (PDAC), remains one of the deadliest cancers, with a five-year survival rate of only 13%. Because the disease is often asymptomatic in its early stages, it is frequently diagnosed at an advanced stage. This situation, coupled with the lack of effective treatments and the immunosuppressive tumor microenvironment that limits the efficacy of immunotherapies, explains the poor prognosis of PDAC. Early detection of this type of cancer is therefore crucial, but current diagnostic tools have limited sensitivity and specificity. 

As it has done every year for the past 23 years, the UNamur community is organizing a series of events to raise funds for the Télévie campaign. In 2026, students have been particularly active through three initiatives.

On March 12, the Student General Assembly brought the house down at the Arsenal during the second edition of the Grand Blind Test at UNamur. It was a fun-filled evening that brought together some thirty teams of staff and students to compete on the biggest hits of the past 30 years, and, thanks to the support of sponsors, raised €6,338.91. 

Finally, the Namur Computer Club dedicated its 24-hour charity livestream on the Twitch platform. Over the course of the hours, and thanks to the generosity, activities, and challenges taken on by the Club’s members, a generous sum of €1,831.91 was donated to Télévie. 

Well done to everyone! 

For several years now, heritage sciences have been experiencing a particularly significant boom. This deeply interdisciplinary field of research aims to foster dialogue between the humanities and natural sciences with a view to improving our knowledge of heritage objects, whether they be parchments, works of art, or artifacts discovered during excavations.

Manuscripts bear witness to ancestral practices and know-how, which unfortunately are poorly documented. It is still unclear why legal documents were preferably written on sheepskin parchment in England from the 13th century until 1925. Among the hypotheses put forward is the fact that sheepskin is whiter, and therefore more attractive, but above all that documents written on it were considered unforgeable due to the tendency of sheepskin to delaminate (any malicious attempt to erase the text would thus be revealed). This delamination property was exploited because it allowed the production of high-quality writing surfaces. It was also used to prepare strong repair pieces used to fill any tears that appeared during the parchment manufacturing process. Understanding why sheepskin delaminates is of interest in the context of traditional parchment preparation techniques, offering valuable insights into the interaction between animal biology, craftsmanship, and historical needs.

Delamination is the phenomenon whereby the inner layers of the skin separate along their interface as a result of mechanical stress. The diagram (a) below shows the structure of the skin, which consists mainly of the epidermis, dermis, and hypodermis. The dermis is divided into two layers, the papillary dermis and the reticular dermis, which contain hair, hair follicles, and sebaceous glands. 

During the parchment manufacturing process, a step following liming involves scraping the skin to remove the hair. This step crushes the sebaceous glands, releasing fats and creating a void where the hair was located (diagram b). 

The study showed that delamination occurs within the papillary dermis itself, in this structurally weakened area, rather than at the papillary-reticular junction as previously assumed. 

The unique nature of the delamination process in sheepskin is highlighted by the skin structure, which differs from that of other animals (calves, goats) used to make parchment, as it has a high fat content associated with a large number of primary and secondary hair follicles. In the study, the presence of fats was confirmed using Raman spectroscopy.

This study combines experimental archaeology and advanced analytical techniques, including scanning electron microscopy (SEM) and micro-Raman spectroscopy, to characterize the delamination process and the adhesion of repair pieces on experimentally produced sheepskin parchment. It benefits from the expertise in archaeometry, biology, chemistry, and physics of the researchers involved.

Beyond its visual and structural implications, delamination has contributed to promoting the use of sheepskin for prestigious documents, improving the surface properties of parchment. The study of the interaction between metal-gallic ink and delaminated sheepskin (wetting experiments) showed that ink diffusion and writing quality are improved, a key finding that provides insight into how surface morphology and composition influence writing performance.

At UNamur, Marine Appart, a PhD student in physics, is conducting this multidisciplinary research on the archaeometry of delamination and repairs on a sheepskin parchment under the supervision of Professor Olivier Deparis (Department of Physics, NISM Institute). 

Also part of the UNamur team are:

• Professor Francesca Cecchet (expert in Raman spectroscopy), Department of Physics, NARILIS and NISM Institutes
• Professor Yves Poumay (skin specialist), Department of Medicine, NARILIS Institute
• Dr. Caroline Canon (histology specialist), Department of Medicine
• Nicolas Gros (PhD student in heritage sciences), Department of Physics, NARILIS and NISM Institutes

Other international experts

• Professor Matthew Collins (world expert in biomolecular archaeology, Department of Archaeology, The McDonald Institute, University of Cambridge, Cambridge, UK)
• Jiří Vnouček (curator and expert in parchment production, Preservation Department, Royal Danish Library, Copenhagen, Denmark)
• Marc Fourneau (biologist) 

This study and the resulting article were inspired by the delamination experiments conducted in 2023 by Jiří Vnouček during a symposium in Klosterneuburg, Austria, in which Prof. Olivier Deparis participated. The symposium was organized by Professor Matthew Collins as part of the ABC and ERC Beast2Craft (B2C) projects.

But it all began in 2014, when the Pergamenum21 project, dedicated to the transdisciplinary study of parchments, was launched.  Pergamenum21 is a project of the Namur Transdisciplinary Research Impulse (NaTRIP) program at the University of Namur. The project received an additional grant in 2016 from the Jean-Jacques Comhaire Fund of the King Baudouin Foundation (FRB).

The projects and events followed one after another, including: 

• May 2014: a transdisciplinary seminar on parchment, the scientific techniques used to characterize this material, and historical questions at the Mauretus Plantin Library (BUMP)
• May 2017: "Autopsy of a scriptorium: the Orval parchments put to the test of bioarchaeology," a transdisciplinary research project co-financed by the University of Namur and the Jean-Jacques Comhaire Fund of the King Baudouin Foundation
• April 2019: a publication in Scientific Reports, Nature group - Jean-Jacques Comhaire Prize: discovery of an innovative technique based on measuring the light scattered by ancient parchments. This technique makes it possible to characterize, in a non-invasive way, the nature of the skins used in the Middle Ages to make parchments
• September 2020: a residential workshop on making parchment from animal skins at the Domaine d'Haugimont – a first in Belgium
• July 2022: a new project on parchment bindings for the restoration workshop at the Moretus Plantin University Library (BUMP) thanks to the Jean-Jacques Comhaire Fund of the King Baudouin Foundation.
• September 2024: a residential symposium-workshop at the Domaine d'Haugimont on the theme of the physicochemistry of parchment and inks using experimental and historical approaches 

Overall, the work of Marine Appart and her colleagues clarifies the structural and material factors that make sheepskin parchment susceptible to delamination and offers new insights into the surface properties of this ancient writing material. UNamur is now establishing itself as a major player in parchment research.

Professor Olivier Deparis, along with several of the researchers involved in this research, are also working on the ARC PHOENIX project.  This project aims to renew our understanding of medieval parchments and ancient coins. Artificial intelligence is used to analyze the data generated by the characterization of materials. This joint study will address issues related to the production chain and the use of these objects and materials in past societies.