Heritage, Volume 6, Issue 6 (June 2023) – 23 articles

This study examines the legal challenges related to preserving sunken military vessels as Underwater Cultural Heritage (UCH) in Colombia. These challenges include Spanish galleon shipwrecks, limited international cooperation, and the lack of legal recognition for sunken military vessels under domestic law (Law 1675 of 2013). To address these issues, this article reviews the concepts of warship and sovereign immunity as they relate to the status of sunken military vessels. The study places a particular focus on the USS Kearsarge, a military shipwreck in Colombian territorial waters protected by the Sunken Military Craft Act of 2004 (SMCA) of the United States. Additionally, it analyzes the legal frameworks and management of UCH in both Colombia and the United States, as well as providing two lists of Colombia’s sunken military vessels and foreign sunken military vessels in its waters. The research concludes by highlighting the complexities of managing UCH in Colombia and offering a prospectus on the future of the USS Kearsarge wreck site as shared heritage. Ultimately, this study underscores the need for a more comprehensive legal framework and greater international cooperation to ensure the preservation and protection of sunken military vessels in Colombia. Full article

As a material, glass has been linked with knowledge and skill mastery for at least three millennia, reflecting the use of traditional tools and technologies inherited from the past. The history of glass speaks of know-how, technological transitions, and contaminations among preferences and raw materials. An increase in the awareness of traditional knowledge underlying the tradition of glass manufacturing has recently been observed with the inscription of the art of Venetian glass beads on the UNESCO list of Intangible Cultural Heritage of Humanity, which has been recognized as a repository of knowledge and mastery of skills, reflecting the use of traditional tools and technologies inherited from the past. However, the potential that glass holds to rediscover the flows and exchanges of technological knowledge in the past has only been explored marginally, and issues linked to the intangible values and the socio-cultural significance of glass are still only sporadically addressed. This review aims to stimulate reflection on the diversity of the significance underlying glass as a material that has marked the cultural and technological history of man. This study will establish the foundation for a methodological reflection in the approach to the study of ancient glass that is intended to help uncover the intangible values that it is an embodiment for. Full article

This research paper focused on tourists’ experiences after engaging in a rural tourism experience, the activities developed during that period, and the relevant factors they considered when planning the holidays. We collected data in the Azores, a region known to implement rural tourism. Therefore, the collected data were analyzed using mainly summary statistics, graphical representations, and exploratory data analysis methods, including the nonlinear (categorical) principal component analysis (CatPCA). The CatPCA’s objective is the same as that of the principal component analysis (PCA). We found that the landscape, adventure-related activities, and local gastronomy were some of the reasons tourists choose the Azores as a destination. The rural living experience and the local population’s welcoming traits were mentioned as factors that make tourists want to return to the Azores on holidays. Moreover, rural tourism in the Azores offers a unique opportunity to connect with the region’s rich cultural heritage. The islands have a long history shaped by centuries of settlement and the blending of various cultures, resulting in a distinct Azorean identity. Full article

This article presents the results of technical studies of the oil painting by the artist of German origin Werner Tübke “Hiroshima I” (1958). The creative heritage of this author has not been studied enough and represents scattered data on the technology of painting and artistic techniques. The aim of this work was to determine the art materials and painting technology described in his diaries, using the example of his only painting represented in Russia: “Hiroshima I”. For this purpose, an in situ approach was implemented using some simple museum instrumentations—UV-induced visible luminescence, infrared reflectography (IRR), radiography, portable X-ray fluorescence (XRF), Fourier transform Infrared spectroscopy (FT-IR), and polarizing microscopy using microprobes. As a result, the pigment composition of the painting layers could be determined, the painting technology refined, and a previously unknown hidden portrait of Werner Tübke’s father revealed. Full article

The palette used on a small painting on copper support, with the inscription “Boceto di Pablo Veronese” on the back, was characterized. Non-invasive techniques such as X-ray diffraction (XRD) and hand-held X-ray fluorescence (XRF) were proven to be highly effective for this. The objectives of the proposed work were twofold. On the one hand, the objective was the study, in situ, of the pigments of a painting on a copper support. On the other hand, it was to enrich the literature related to the study of paintings on metal supports, since few related studies are available despite the relatively large number of such 16th and 17th century paintings from Italy and Northern Europe. The results of the analysis showed a copper support with a base layer of gypsum mixed with ochre earths. Atop this layer is a sketch with lead white in the lighter areas and bone black in the darker shadow areas, suggesting that the artist performed a preliminary study of the luminosity of the scene. Finally, the upper or pictorial layer consists of a mix of pigments with some lead white to lower saturation and increase lightness, particularly evident in the flesh tones. The resulting palette thus includes lead white, vermilion, bone black, Naples yellow, and lazurite pigments. These results are compared to Veronese’s other paintings, as well as to those of certain contemporary artists, and the use of the resulting pigments in 16th and 17th century Italian painting techniques is discussed. Full article

Two simple mass-balance models for estimating the concentration of air pollutants inside buildings are presented for pollutants originating from outdoors or generated indoors. The models can be used to establish average pollution loads on heritage objects inside buildings and assist in risk assessment for conservation. The models can be run with a minimum of data, either based on fixed conditions or as a Monte Carlo simulation based on plausible intervals of the input factors. Input data can be obtained by simple measurements or based on the literature. A museum storage hall in Denmark was used as a test site for demonstrating the models. They were evaluated with regard to the prediction of the indoor/outdoor concentration ratio for ozone and nitrogen dioxide and the build-up concentration of indoor generated organic acids. The pros and cons of such models were discussed, where the main reservation is related to shortcomings when real buildings are more complicated than the single-zone structure of the models. A strength of the models is the easy adaption to an indoor environment and, despite being semi-quantitative at times, the simplicity of the models, which allows for practical everyday use in air quality management of heritage buildings. Full article

This article presents an analytical procedure developed to replicate, document, and analyse the formation and evolution of use-wear traces on task-specific ground stone tools. The purpose of this study is to build a reference collection for wear patterns that occurred during the processing of vegetal resources, specifically those compatible with the MIS 3 period. To create the collection, riverine slabs and pebbles were utilised and various aspects related to their use in the transformation of aerial and underground plant organs were explored. Moreover, the feasibility of using perishable supports, such as a wooden base, for processing tasks was examined. The experiments explored the transformation of pebble stone surfaces during repeated cycles of processing plant organs by monitoring and recording the features at fixed intervals. Several variables that affect the surface texture, morphology, distribution, and extent of use-wear traces are identified and discussed. The influential factors under control included the petrographic and morphological characteristics of the unused stones, the type and amount of transformed vegetables, and the duration of the process, as well as monitoring human factors. The documentation strategy applied at various stages of the experiment was found to be suitable for tracing the cumulative development of wear. The replicative collection was tailored to the morphological and petrographic characteristics of the ground stone tools retrieved from the level attributed to the Prut River culture of Brînzeni I, a cave site located in NW Moldova. Full article

Over the last decade, several projects have been developed to digitise and semanticise cultural heritage data. They have been developed to preserve and maintain this heritage, but also to make it accessible to all types of users and to other sectors such as tourism and education. These developments combine the use of knowledge graphs and interactive visualisation tools with web technologies. Although remarkably interesting projects have been developed, the data visualisation tools in these projects tend to focus on the project context. Consequently, it is difficult to reuse the results of these projects. In addition, there are characteristics of cultural heritage information, such as uncertainty and spatial and temporal granularity, that have not been considered, and how to deal with them has not been described. The same is true for other aspects, such as the relationships between different objects. Considering these problems, this study presents a model that formalises how to visualise this information. The design of an ontology that implements this model, based on other works such as VUMO or VISO, is described. Furthermore, the design and development of a software framework that allows the visualisation of this information through a web application are presented. The evaluation of the application of this framework in projects such as SILKNOW or Arxiu Valencià del Disseny is outlined. Full article

The goal of this research is to make photogrammetric surveys of the walls of Cortona from 2012 accessible using new methodologies for recovering photographic material. This will allow a team of archaeologists to carry out a virtual reconnaissance of the surveyed stretch of wall as well as provide the basis for future investigations into any potential changes that may have occurred in the wall since 2012. Photogrammetry is a widely used technique in archaeology that can help researchers accurately measure, reconstruct, and analyze different architectural components of the wall. By using state-of-the-art photogrammetric techniques, including advanced computer vision algorithms, our team aims to produce high-quality 3D models and accurate measurements of different parts of the wall. The results of this research project will enable archaeologists to gain a more comprehensive understanding of the layout of the fortifications and the role of the Cortonese walls in the historical context of the area. Additionally, the research project will provide a detailed documentation of the wall that will be useful for both archaeological researchers and cultural heritage organizations. Finally, the research project will also provide the basis for future investigations into potential changes that may have occurred in the wall since 2012, which will be important for monitoring conservation and restoration efforts and providing an up-to-date record of the wall’s state of preservation. Full article

The Virgin Hodegetria, located in the Cathedral of Santa Maria Nuova in Monreale, near Palermo (Italy), probably dating the first half of the 13th century, is one of the earliest examples of medieval panel painting in Sicily. A diagnostic campaign was carried out on the panel aiming to identify the constituting materials and the executive technique, as well as to assess the state of conservation for supporting the methodological choice of the restoration intervention. Both non-invasive (X-ray radiography, digital microscope, multispectral imaging, ED-X-ray fluorescence) and micro-invasive (polarised light microscopy, ESEM-EDX, ATR-FTIR spectroscopy and micro-Raman spectroscopy) analyses were performed. According to the results, the executive technique followed the 13th–14th-century Italian painting tradition. A complex structure was applied on the wooden support, consisting of a double layer of canvas and several ground layers of gypsum and glue-based binder. The underdrawing was made by a brush using carbonaceous black pigment. The original palette includes red ochre, red lead, azurite, carbon black and bone black. During the several restorations, mercury-based red, indigo, smalt blue, orpiment and synthetic mars were used. The original silver leaf of the frame was covered with red tin-based lake and subsequently regilded with gold leaf. Proteinaceous and oil binders were also detected. Full article

During the last three years, COVID-19 has had a huge impact on both tourism and culture globally. The function of every kind of cultural activity was inhibited due to curfews in all public spaces, including museums, galleries, monuments, and archeological sites, which were forced to interrupt their operation due to the restrictions that were implemented for the protection of public health. In many cases, also in Greece, museums or archeological sites employed the use of digital systems and social media, always carefully abiding by all the security measures. This study aims to investigate the impacts of COVID-19 on public museums in Greece and to pursue possible opportunities in order to improve the museums’ extroversion through the application of new strategies based on ‘New Technologies’. This is achieved through a qualitative methodology with the use of 17 semi-structured interviews to executives of Greek public museums, in order to examine the situation through various aspects, which will reinforce the sustainability of Greece’s cultural domain and its acceptance on the cultural sector. The analysis of data revealed both positive and negative results in this form of investigation. Full article

The castle on Kozlov Rob above Tolmin is one of the most important historical sites in western Slovenia. Over the years, large quantities of finds dating from the late medieval and early modern periods have been recovered from the castle ruins in the process of archaeological investigations and construction works. Many of the recovered iron artefacts are extremely difficult to identify due to their fragmentary state. This paper presents the study of four relatively recently discovered artefacts. The available evidence suggests that at least one of them belongs to a helmet, while another has been identified as the remains of a lock. The artefacts were analysed with X-ray radiography and X-ray diffraction. Additionally, samples were taken for microhardness Vickers measurements and metallographic analysis with a light microscope and a scanning electron microscope. Additional microchemical and structural phase analysis were done with the electron microscope. The aim of archaeometallurgical analyses is to contribute to a more precise interpretation and add a new dimension to our knowledge of the castle site at Kozlov Rob. Full article

In the last ten years, Virtual Reality (VR) and Augmented Reality (AR) technologies have been rapidly developed as a means to distribute digital content and to disseminate organizations worldwide. Cultural industry adopted these technologies and developed applications as a means of strategic development in the digital world and in order to “internationalize” their audience. Moreover, these technologies offered the opportunity to reshape the whole industry by enriching (physical and digital) visitors’ experiences. Current research provides evidence about developing VR and AR tools that can act as internationalization facilitators when it comes to cultural industry. Research was conducted during the “VARSOCUL” project funded by the European Regional Development Fund (ERDF) as part of the Greek National Scope Action entitled “RESEARCH-CREATE-INNOVATE”. The project’s main result are presented, alongside with VR and AR tools developed. Full article

Stability problems in rock masses are one of the main causes of subsidence events in underground mining areas. Zaruma, in the South of Ecuador, is characterised by mineral wealth, in which 65% of the population depends directly on artisanal mining activity. However, mineral extraction, without technical considerations and in many cases illegal, has negatively impacted the stability of tunnels generated under the city’s urban area, reporting subsidence events in recent years. The aim of this study is to geomechanically characterise the main gallery of the tourist mine “El Sexmo” using two classic methods of geomechanical classification for the configuration of a model that complies with the 3G’s (geotourism, geoconservation, and geoeducation) and supports the culture of sustainability in all areas of the sector. The methodology consists of (i) a field study design, (ii) a geological–geomechanical survey of the rock mass of a tourist mine using rock mass rating (RMR) and the Q-Barton index, and (iii) establishing a 3G’s model for sustainable development. The results reveal that 100% of the rock mass of the tourist mine presents a rock quality classified as “Fair” (class III) by the RMR method, while, via the Q-Barton method, 92.9% of the rock mass obtains a “Poor” rating, except for station S05, rated “Very Poor”. Furthermore, the study proposes additional support measures for three specific stations based on Q-Barton assessments, including fibre-reinforced sprayed concrete and bolting and reinforced ribs of sprayed concrete, considering that the mine is more than 500 years old and maintains geological features for geoeducation in geotechnical mining. Technical and social problems demand an innovative strategy, which, in this work, focuses on the 3G’s model based on the quintuple innovation helix to develop sustainable underground geotourism. Full article

The long-term endurance of building stones must be assured since their longevity has repercussions for their economic and social value. Frequently, slabs for flooring and cladding are installed with polished finishing in outdoor environments for technical and ornamental purposes in cultural heritage sites and modern civil architecture. Compared to any other finishing, glossy surfaces are rather vulnerable to wear, particularly when they interact with slightly acidic rainwater. Several hydrophobic treatments are applied to prevent this damage by preventing contact between rain and stone; such treatments are efficient but sometimes non-durable. Stakeholders and conservation scientists need better methods to anticipate the future behaviour of this building material and hydrophobic solutions. Complying with this demand, a comparison is made between outdoor natural ageing and artificial weathering, reproduced by UVA radiation, moisture and spray accelerated weathering. Artificial weathering is applied to predict the behaviour of stones over time in the real environment. Data obtained through the measurement of gloss and colour parameters, the detection of micro-textures through SEM, and the calculation of micro-roughness using a digital rugosimeter demonstrate that weakly acidic rainwater is the main cause of superficial decay of stone finishing over just six months of outdoor exposure. This period corresponds to 7–14 days of artificial weathering. Furthermore, the loss of efficiency and durability of the hydrophobic coatings is detected by measuring the static contact angle. This highlights that even if a protective treatment was proficient, it could easily deteriorate in normal weathering conditions if applied on polished, low-porosity stone. Additionally, water vapour permeability indicates variations of regular vapour transmission through the stones due to ageing. The first solution to threats is the prevention of pathologies, including aesthetic ones. A careful choice of the most suitable lithotype finish and an environmental study represent an existing solution to the problem. It must be highlighted that aesthetic requirements should not be prioritised to detriment of the technical requirements of architectural quality, performance, durability, and safety. Full article

Fishing in the Mazarrón Bay has been practiced since prehistoric times. This was one of the basic pillars of the area’s economy; however, due to the development of tourism, this maritime activity has been pushed into the background. The changes in the fishermen’s way of fishing in the last decades of the 20th century, as a consequence of the proliferation of boats with greater extractive capacity, have meant that much of the fishing gear has fallen into disuse. The main objective of this research is the compilation of information on their use and the available tools of this heritage in order to preserve their history. In order to do so, the archives of the Mazarrón Fishermen’s Guild were consulted and interviews were conducted with local fishermen over 80 years of age, who fished with devices that are no longer in use today. The results show that it is possible to promote them as tourist attractions, with the aim of raising awareness of the fishing identity and the environment in which it is practiced, in the southeast of the Iberian Peninsula. Full article

This exploratory study investigates the challenges for the heritage tourism industries in the UAE by focusing on the strategies and policies adopted during the COVID-19 pandemic. This study aims to identify the business strategies, analyze the contextual challenges for service providers, and explore how providers managed these challenges during the COVID-19 pandemic. A multi-case study approach is adopted with 12 renowned and leading heritage tourism providers (CEOc, managers, and relationship managers) Additionally, four tourism academics interviewed through qualitative semi-structured interviews. The data were obtained during the post-COVID-19 economic recovery period from January 2022 to November 2022. The protocols of the Delphi technique and the Template Analysis (TA) approach were combined to develop richer insights. Initially, the challenges discovered were thematically categorized under two levels, which were (i) Inconsistencies for Heritage Tourism and (ii) Appreciation for Heritage Tourism. As a result, subsequently, four multi-tiered themes (macro, meso, and micro level) emerged as a response to the current challenges: (i) Repackaging heritage tourism, (ii) Long-term safety measures for tourists, (iii) Organizational adaptation and innovation, and (iv) Creative recommendations. The novelty of this study is inherent in its contextualization of an under-explored area, concurrent analysis of a dynamic and lucrative sector, and methodological advancement through the embellishment of techniques. Based on the findings of this research, a contextualized framework is proposed that complements tourism theory and delivers credible implications for researchers, government planners, and tourism providers. Full article

The use of stone to build shelters was an important step in terms of ensuring buildings’ durability and security in pre-historic times. It was also an acknowledgment of power and grandeur when societies demonstrated their respect for their leaders and gods by building stone monuments. For this reason, cathedrals, churches, and other magnificent religious monuments were built around the globe; however, the importance of the stone used in their construction itself is not sufficiently appreciated as the key factor ensuring the endurance of these historic buildings. While Western countries have long used iconic buildings to promote their heritage and advance in other socio-economic aspects, including tourism, other regions are yet to take full advantage of this outlook, even though their monumental structures may be equally impressive. Those important monuments are built of stone, which were referred to as Heritage Stones by some research groups, and their recognition would showcase the cultural and geological diversity of the world. However, there are many stones of heritage importance from geographic areas that are under-represented in the scientific literature and the work of research groups. This paper presents a review of the degree of geographical diversity in the recognition of stones and their heritage value. Full article

The Archbishop’s Palace of Seville harbours an important art collection with mostly works by great Renaissance and Baroque artists. However, the authorship of some paintings is unknown, and, in a few cases, there is an interest in discovering the painter due to the quality of the artwork. As a first step for this purpose, a systematic analysis procedure has been established using non-destructive techniques, such as UV photography and IR reflectography, to locate interventions and underpaintings, as well as X-ray fluorescence to identify original pigments and those of later interventions. The study following this established protocol is presented with the example of two paintings by unknown authors. They were made in different centuries representing, consequently, different styles. UV images showed several retouches, while IR reflectography revealed under-drawing and composition corrections (pentimenti). Furthermore, XRF identified the pigments applied in the production of the different colours and tonalities, allowing to characterise the artist’s palette, whose pigments generally agree with the dates when the artworks were produced. This study resulted in valuable information on painting materials and techniques, which will be useful in the search for authorships, among others. Full article

The research presents the results of a survey carried on in Craiova, one of the largest Romanian cities, which contains numerous buildings from the late 19th and early 20th centuries, some of which were reconsolidated and brought back to use, while others are still decaying. The aim was to spatially investigate residents’ perceptions of the built heritage in the historical city center of Craiova based on questionnaires and mapping perceptions using the Emotional GIS (EGIS) methodology proposed by Wang (2021) and the extent to which this heritage could be a valuable asset for cultural tourism. The alteration of function as well as the context for part of the historical area of the city center testify to the musealization of the study area. The large number of buildings included on the heritage list outlines the characteristics of a living open-air museum, capitalizing on the heritage in situ. Full article

Sustaining karst landscape areas in World Heritage Sites under increasing human pressures and climate change is an emerging challenge. Growing evidence has highlighted the transition from traditional government-oriented regulation to the collaborative governance of different stakeholders in governing karst landscape resources. However, the complexity and dynamics of karst landscape policy and stakeholder networks are poorly understood. This study combined a legislative analysis, network analysis, and public survey to explore effective methods of karst landscape conservation in the Guilin World Heritage Site, China. The policy analysis showed that various national laws and local regulations have been enacted in China, but these regulations often focused on individual aspects of karst–human interactions. The network analysis indicated the complexity and relationship of networks in karst World Heritage Site governance at the national, provincial, and municipal scales. The majority of questionnaire respondents (65–89%) reported a medium and high level of karst landscape governance effectiveness. The insights in the present study may be valuable for other karst World Heritage Sites facing complex challenges, especially in developing countries. Full article

Although archaeological excavations have recovered a large number of vessels used to hold perfumes or ointments in ancient Rome, little is known about the chemical composition or origin of the substances they contained. Most available information pertains to ointment and/or cosmetic bases rather than to essences. The discovery in 2019 of an ointment jar (unguentarium) made of rock crystal (quartz) that was sealed with a stopper and contained a solid mass in a Roman tomb in Carmona (Seville, Spain) was a rather unusual finding. This paper reports the results of an archaeometric study of the unguentarium stopper and its contents. Based on them, and on comparisons with commercially available patchouli and nard oil standards, the perfume held in the unguentarium was probably patchouli. To our knowledge, this may be the first time a perfume from Roman times has been identified, which is a major advance in this field. The unguentarium stopper consisted of dolomite, a material also unknown in this type of use, and bitumen was used to seal the unguentarium with the stopper. Full article