{"title":"In situ long-term monitoring of microbial patinas on the external marble of Florence Cathedral after treatments with essential oils","authors":"Alba Patrizia Santo , Oana Adriana Cuzman , Teresa Salvatici , Beatrice Agostini , Brunella Perito","doi":"10.1016/j.culher.2025.06.012","DOIUrl":"10.1016/j.culher.2025.06.012","url":null,"abstract":"<div><div>The control of biological patinas on cultural heritage stones is a challenging task as treatments are often not long-lasting, and the microorganisms naturally tend to colonize any surface that meets their living requirements. Historically, the most widely used strategy to combat the biodeterioration of stone cultural heritage has involved the application of synthetic and aggressive biocides. However, recent developments have shifted towards more sustainable conservation methods, including the use of natural biocides. Among these, essential oils (EOs) have gained attention due to their well-documented antimicrobial properties. In previous work, we treated selected areas of the external marble of Florence Cathedral, which were affected by extended darkening, with thyme and oregano EOs. The efficacy of these treatments was assessed in the short- and mid-term using a multidisciplinary approach. In this work, we report the long-term evaluation (after four years) of these treatments, employing on-site microscopy, non-invasive colorimetric, and ATP (adenosine triphosphate) assays. This study shows that treatments performed with different solutions have varying efficacy over time, and that the solutions containing both thyme and oregano essential oils (OT) are those showing the best long-term effectiveness on microbial activity. This extended monitoring period is crucial for understanding the durability of the treatments and their effectiveness in controlling biodeterioration over time.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 246-256"},"PeriodicalIF":3.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
José A.R. Monteiro , Liliana Cardeira , Ana Bailão , Sérgio Miguel Cardoso Nascimento , João M.M. Linhares
{"title":"Reviving the colors of paintings by removing the protective coating: a physical and virtual intervention","authors":"José A.R. Monteiro , Liliana Cardeira , Ana Bailão , Sérgio Miguel Cardoso Nascimento , João M.M. Linhares","doi":"10.1016/j.culher.2025.06.015","DOIUrl":"10.1016/j.culher.2025.06.015","url":null,"abstract":"<div><div>When an existing coating over a painting is detrimental to its reading and full appreciation, it needs to be removed. Coating removal to reveal the underlying painting, with minimal physical intervention, may provide additional information regarding the painting and guidance for its restoration or intervention.</div><div>A Neural Network (NN) was devised to simulate the removal of a painting’s coating, using as training data a small area of the painting where the coating had been physically removed. Simulations of coating removal using the NN and two additional methodologies were compared to actual physical removal.</div><div>Hyperspectral images of the paintings with and without coating were acquired, and chromatic variations were computed by estimating differences in just-noticeable different colors (JND) values and in the color gamut, using CIECAM16-UCS. Comparisons were made between paintings with and without coating, and between paintings without coating and their simulations.</div><div>Results showed that removing the coating led to an increase in JND values (1.8 times on average) and in the color gamut, but the magnitude was dependent on the initial condition of the coating. When simulating coating removal, the NN produced the best chromatic simulation, with an average JND of approximately 2.6 ± 0.5 (1.1 ± 0.2 excluding lightness), while other methodologies produced differences of approximately 8.6 ± 5.7 (3.7 ± 3.0 excluding lightness).</div><div>Results achieved with the NN highlight its capability for simulating coating removal with minimal physical intervention to the painting, a valuable tool when complete coating removal without outcome prediction would be undesirable.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 322-331"},"PeriodicalIF":3.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tingting Li , Lihong Li , Ziru Yu , Bo Ning , Yong He , Wenxiu Wan , Zhiyuan Liu , Xiangyang Yu
{"title":"Non-destructive classification of ancient mural pigments by hyperspectral imaging","authors":"Tingting Li , Lihong Li , Ziru Yu , Bo Ning , Yong He , Wenxiu Wan , Zhiyuan Liu , Xiangyang Yu","doi":"10.1016/j.culher.2025.06.014","DOIUrl":"10.1016/j.culher.2025.06.014","url":null,"abstract":"<div><div>Given the vulnerability and value of ancient murals, there is an urgent need to identify, restore and preserve their pigments. This study develops an image spectral fusion (ISF) method integrating hyperspectral imaging with optimized superpixel segmentation and spectral processing to achieve rapid, non-destructive pigment classification. Applied to the Yungang Grottoes murals, the Support Vector Machine model based on ISF realizes the superpixel-level classification of ancient mural pigments with an accuracy of 87 %. External validation demonstrates its excellent classification performance across diverse mural preservation states. Spectral characterization analyses reveal the potential of the method in pigment identification through spectral matching, and pigment mixtures classification. This non-destructive, contactless detection method can serve as a methodological foundation for pigment identification in murals.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 353-362"},"PeriodicalIF":3.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Erato Kartaki , Graeme Earl , Dean Sully , Nicola Harrison , Timea Grego
{"title":"Accelerated ageing test (Oddy test) of additive manufacturing materials for cultural heritage use","authors":"Erato Kartaki , Graeme Earl , Dean Sully , Nicola Harrison , Timea Grego","doi":"10.1016/j.culher.2025.06.018","DOIUrl":"10.1016/j.culher.2025.06.018","url":null,"abstract":"<div><div>Restoring missing parts of cultural heritage (CH) objects, such as sculptures, archaeological artefacts, or decorative arts, typically marks the final phase in the conservation process. During this treatment, conservators rely on materials known for their ageing properties and lack of adverse effects on the historical item. As technology progresses, new methods and techniques emerge, including additive manufacturing (AM), which has been employed in CH restoration since the early 2010s. However, questions within the CH conservation community have arisen about the suitability of AM materials for this purpose.</div><div>This paper outlines the process and presents the outcomes of an accelerated ageing test on collected ceramic, ceramic-like, glass-like, paper-based and polymer AM materials. The Oddy test results suggest that some commercially available AM materials are suitable for conservation use. However, inconsistent results across different labs highlight concerns about the reliability and consistency of Oddy testing. This procedure is an integral part of a doctoral research project focused on the use of additive manufacturing method to restore ceramic and glass archaeological artefacts. This research could benefit conservators of antiquities and works of art, museum curators and material scientists who would like to use the additive manufacturing method as a complementary restoration method for their conservation process or museum curation.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 311-321"},"PeriodicalIF":3.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gioacchino Tempesta , Alessandro Monno , Francesco Paolo de Ceglia , Andrea Maraschi , Elena C.L. Rigante , Cosima Damiana Calvano , Giancarlo Capitani
{"title":"Multi-analytical approach for identification of early artificial ultramarine, made by Raimondo di Sangro, in the blue frame on the altar of the Sansevero Chapel Museum in Naples","authors":"Gioacchino Tempesta , Alessandro Monno , Francesco Paolo de Ceglia , Andrea Maraschi , Elena C.L. Rigante , Cosima Damiana Calvano , Giancarlo Capitani","doi":"10.1016/j.culher.2025.06.013","DOIUrl":"10.1016/j.culher.2025.06.013","url":null,"abstract":"<div><div>The history of ultramarine, a vivid blue pigment derived from lapis lazuli, spans thousands of years. During the 16th to 18th centuries the demand for ultramarine remained high, but its production was limited to specific regions and was extremely expensive. It was used sparingly by artists due to its cost, with some opting for cheaper alternatives such as azurite. In the first half of the 19th century, advancements in chemical knowledge allowed the production of artificial ultramarine, which then spread throughout Europe. The identification of natural versus artificial ultramarine has become a challenge. Here we present analytical results signifying that Raimondo di Sangro (Prince of Sansevero) produced artificial ultramarine before the well-known registered invention by Jean Baptiste Guimet. A detailed study of the chemical composition by SEM-EDS and TEM EDS, along with the absence of accessory minerals commonly found in natural pigment and the presence of uncommon phases, revealed the synthetic origin of the pigment found in the blue frame on the high altar in Sansevero Chapel Museum (Naples, Italy). Moreover, the reflectance spectra disclose an uncommon shift in the main band of the pigment, distinguishing it from both natural ultramarine and more recent synthetic versions. Further, a deep comparison with previous literature data also strengthens our experimental evidence. These results open a new perspective about the first production of this artificial blue pigment.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 265-275"},"PeriodicalIF":3.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Promoting conservation sustainability: Analysing biomaterials in 6–8th century Aurangabad cave mud plasters","authors":"Bhushan B Dighe , Manager Rajdeo Singh","doi":"10.1016/j.culher.2025.06.020","DOIUrl":"10.1016/j.culher.2025.06.020","url":null,"abstract":"<div><div>This pioneering study offers a fresh perspective on ancient Indian mural artistry by analyzing the biomaterial composition of 6th-8th century mud plasters from the Aurangabad Caves. Using advanced techniques—Stereo Microscopy, Polarized Light Microscopy, FTIR, and GC/MS—the research identifies previously undocumented organic additives, including Echinochloa and millet grains, Fumaria seeds, proteins, waxes, and natural resins. The absence of rice husk and strategic use of straw and Echinochloa grains reveal a unique adaptation to the semi-arid climate, enhancing plaster durability, water repellence, and crack resistance. This first-of-its-kind analysis uncovers the sophisticated material selection by ancient artisans, offering insights for eco-friendly restoration of historic mud plasters. The study bridges historical craftsmanship with modern sustainable practices, contributing to low-carbon building methods and environmental sustainability.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 276-288"},"PeriodicalIF":3.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PyPotteryInk: One-step diffusion model for sketch to publication-ready archaeological drawings","authors":"Lorenzo Cardarelli","doi":"10.1016/j.culher.2025.06.016","DOIUrl":"10.1016/j.culher.2025.06.016","url":null,"abstract":"<div><div>Archaeological pottery documentation traditionally requires a time-consuming manual process of converting pencil sketches into publication-ready inked drawings. This paper presents <em>PyPotteryInk</em>, an open-source automated pipeline that transforms archaeological pottery sketches into standardised publication-ready drawings using a one-step diffusion model. Built on a modified <em>img2img-turbo</em> architecture, the system processes drawings in a single forward pass while preserving crucial morphological details and maintaining archaeologic documentation standards and analytical value. The model employs an efficient patch-based approach with dynamic overlap, enabling high-resolution output regardless of input drawing size. The effectiveness of the approach is demonstrated on a dataset of Italian protohistoric pottery drawings, where it successfully captures both fine details like decorative patterns and structural elements like vessel profiles or handling elements. Expert evaluation confirms that the generated drawings meet publication standards while significantly reducing processing time from hours to seconds per drawing. The model can be fine-tuned to adapt to different archaeological contexts with minimal training data, making it versatile across various pottery documentation styles. The pre-trained models, the Python library and comprehensive documentation are provided to facilitate adoption within the archaeological research community.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 300-310"},"PeriodicalIF":3.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
André Luiz Carvalho Ottoni , Lara Toledo Cordeiro Ottoni
{"title":"A deep learning approach for cultural heritage building classification using transfer learning and data augmentation","authors":"André Luiz Carvalho Ottoni , Lara Toledo Cordeiro Ottoni","doi":"10.1016/j.culher.2025.06.010","DOIUrl":"10.1016/j.culher.2025.06.010","url":null,"abstract":"<div><div>The detection of architectural components in historic buildings is essential for digital documentation and the conservation process of cultural heritage. In this regard, recent studies have explored artificial intelligence with computer vision to enhance the detection of key components in monuments. However, this field of research still lacks investigation into the influence of using transfer learning and data augmentation to improve the performance of machine learning models. Moreover, the literature still requires research on Artificial Intelligence applied to Brazilian colonial architecture. Thus, this study proposes a new deep learning approach for cultural heritage building classification using transfer learning and data augmentation. For this purpose, the ImageMG dataset is proposed, containing 6449 images of 94 historic buildings from the state of Minas Gerais (Brazil), categorized into five classes: fronton, church, door, window, and tower. Additionally, the influence of using transfer learning to enhance the classification results of the Mobilenet architecture in the task of detecting components of historic buildings is evaluated. The proposed approach also investigates the effects of 64 combinations of data augmentation, utilizing six geometric transformations (zoom, width shift range, height shift range, vertical flip, horizontal flip, and rotation) for generating synthetic images to train the deep learning models. The results showed that the optimization of transfer learning in conjunction with data augmentation demonstrated significant advances in the performance of cultural heritage building classification. Experiments with the ImageMG dataset using transfer learning and vertical flip achieved the best accuracy results in validation (92.37 %), test 1 (90.22 %), and test 2 (87.33 %).</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 214-224"},"PeriodicalIF":3.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Laurianne Robinet , Sylvie Heu-Thao , Giulia Galante , Gaël Latour , Aurélie Tournié , Céline Daher , Anca Dan , Marie-Claire Schanne-Klein , Anne Michelin , Jocelyne Deschaux
{"title":"The Mappa mundi of Albi: Insight into the manufacturing, life and conservation state of an 8th century world map","authors":"Laurianne Robinet , Sylvie Heu-Thao , Giulia Galante , Gaël Latour , Aurélie Tournié , Céline Daher , Anca Dan , Marie-Claire Schanne-Klein , Anne Michelin , Jocelyne Deschaux","doi":"10.1016/j.culher.2025.05.013","DOIUrl":"10.1016/j.culher.2025.05.013","url":null,"abstract":"<div><div>The <em>Mappa mundi</em> of Albi is one of the oldest examples of spatial representation of the Western world. The small map conserved on the verso of folio 57 in manuscript 29 of the <em>Médiathèque Pierre Amalric</em> in Albi (France) was drawn on parchment, probably made in the second half of the 8th century, somewhere between south-western France and northern Spain, maybe in Albi itself. Because of its exceptional importance for the history of space representation, the map, together with the <em>Index of seas and winds</em> facing it, on the recto of folio 58, was recorded in the UNESCO Memory of the World Register in 2015. The detailed study published here has examined the manuscript’s structure and characterised the different constitutive materials. Observations and physicochemical analyses were performed on the map and the index, from the micro to the macroscale, combining optical microscopy, XRF, FORS, FTIR, and micro-Raman spectroscopy, hyperspectral imaging, proteomic analysis, and non-linear optical microscopy. Three manuscripts conserved at the same library or suspected to have been produced in the scriptorium of Albi have also been examined for comparisons. This material investigation complements the historical studies of the map by shedding new light on the manufacturing, life, and conservation state of this exceptional document.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 341-352"},"PeriodicalIF":3.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A novel air-coupled ultrasonic technique for assessing the weathering degree of sandstone heritage","authors":"Yuan Cheng , Guanpeng Xia , Ruoyu Zhang , Yue Zhang , Yicheng Li , Jizhong Huang","doi":"10.1016/j.culher.2025.06.005","DOIUrl":"10.1016/j.culher.2025.06.005","url":null,"abstract":"<div><div>In the realm of stone cultural heritage weathering detection, both gel-coupled and non-coupled contact ultrasonic testing are prevalently employed. However, these techniques harbor inherent challenges, such as potential contamination from coupled and the risk of relic damage during contact ultrasonic testing. The advent of air-coupled ultrasonic testing presents a safer alternative for weathering detection of stone cultural heritage, though its stability and applicability in weathering degree detection require further validation. In this research, using sandstone samples from the Yungang Grottoes, we conducted simulated weathering tests under freeze-thaw cycles and acid soaking conditions. An air-coupled ultrasonic test system was set up, and the ultrasonic velocity of sandstone samples was calculated based on the obtained original waveforms. Meanwhile, the samples of sandstone with different weathering degrees were tested by gel-coupled, contact ultrasonic testing and many common non-destructive testing techniques; the value of ultrasonic wave velocity and its change trend with weathering process were analyzed by means of least square regression model and correlation analysis. The results revealed that the wave velocity dispersion of air-coupled ultrasonic in repeated detection is significantly lower than that of the other two traditional ultrasonic detection techniques; the obtained wave velocity is more consistent with the change trend of weathering degree, which has high applicability in the weathering degree detection of stone cultural heritage; the correlation with other non-destructive testing results is stronger. In summary, the air-coupled ultrasonic test technology can provide more accurate, safe, and effective weathering detection data, showcasing strong applicability and broad application prospects in the detection of stone cultural heritage, thus offering important support for their protection.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"74 ","pages":"Pages 204-213"},"PeriodicalIF":3.5,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144510721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}