Search Results (471)

This paper addresses the important issue of the proper management and protection of subterranean monuments. It concerns the analysis and decoding of the microclimate that is created in heritage structures, which are structures located beneath the soil or carved into rock. The aim of this study is to understand the hygrothermal processes occurring in the mass of underground structural elements, such as evaporation, condensation, water content, and heat fluxes, based on the principles of building physics. The methodology used is the following: a systematic literature review on the topic, an overview of the factors affecting the microclimate, the assessment methodology, and the simulation tools used to decode and evaluate microclimate in subterranean heritage structures; a discussion of the current gaps; and finally, a proposal for future directions for research. A review of the literature reveals that researchers worldwide have employed similar methodologies to approach this complex issue. Recordings and analyses of the microclimate inside underground monuments lead to decision-making and the formulation of actions for optimal preservation. Due to the large number of parameters involved in microclimate analysis, computer software for numerical simulation has been used in many cases. Following the review of the relevant literature in the field of study, a critical discussion concludes by proposing directions for future research on this important topic. Basic results of this research identify current gaps, problems, and limitations. These include technical and practical issues or gaps concerning lack of data for material properties and weather conditions. Another significant limitation arises from the complexity of physical interactions, as well as from the human factor, which involves the proper use of the simulation program and the correct interpretation of the calculation results. This study demonstrates that the microclimate of subterranean heritage structures is the result of complex interactions between climate, geology, architectural design, material properties, and human use. Across different geographical and cultural contexts, subterranean monuments exhibit distinct microclimatic behaviors. The comparative analysis of case studies highlights that while subterranean environments generally benefit from thermal stability, they remain highly vulnerable to moisture dynamics, ventilation changes, and external climatic coupling. Hence, there is a necessity for context-specific approaches rather than generalized conservation solutions. Decoding subterranean microclimates requires a multidisciplinary framework that combines environmental monitoring, material indicators, architectural analysis, and numerical modeling. Full article

Spolia, defined as reused architectural elements in constructions, constitute a diachronic practice extending from antiquity to modern times, mostly denoting war trophies. Their application was related to multiple parameters including technical, economic, aesthetic, symbolic, and cultural aspects. In all cases, the reuse of high-quality, processed materials could be associated with the diachronic principles of sustainability. Therefore, spolia can be characterized as precursors of the contemporary circular resource management strategies adopted in the constructional sector. In the present paper, the spolia identified in nine monuments in Thessaloniki, dated throughout a wide period of 1.5 millenniums (from the Roman to the Ottoman era), were studied. Analysis results, regarding their location, functional use, type, origin, geometric characteristics, and technology, were statistically processed and concluding remarks were assessed. Their application was classified into three principal categories related to structural, functional, and symbolic usage, rendering spolia material mediators between successive historic periods, through which memory, cultural identity, and architectural continuity can be foreseen in the city of Thessaloniki. Full article

This work presents the results of an archaeometric research study of the geomaterials used in the construction of the Late Antique wall of Emerita Augusta (currently Mérida, Spain). Dated to the 5th century C.E., this structure belongs to one of the best-preserved historical ensembles in Europe. In-depth knowledge of the geomaterials used in this ancient wall is essential for ensuring reliable restoration strategies and the successful long-term conservation of this monument. To this end, a rigorous sampling procedure was conducted in areas containing original archaeological remains. Samples were characterized using optical microscopy, X-ray diffraction (XRD), X-ray fluorescence (XRF), inductively coupled plasma–mass spectrometry (ICP-MS), thermogravimetry and differential thermal analyses (TGA-DTA), and scanning electron microscopy (SEM). This integrated multi-analytical approach is highly effective for the study of built heritage. The mineralogical, textural, and geochemical properties of the granites allowed for the identification of the granite types used in the wall, while the results obtained for the mortars indicated that lime, fully carbonated and transformed into calcite, was used as the binding agent. Furthermore, the binder/aggregate ratios were found to be consistent with traditional Roman mortar formulations. These findings provide a comprehensive understanding of the material provenance and construction techniques used in this landmark of late antiquity. Full article

This study presents a comparative evaluation of three modern surveying techniques—UAV photogrammetry, static tripod-based LiDAR scanning, and handheld mobile LiDAR—applied in the context of historic monument restoration. The focus is on analysing workflow efficiency, data accuracy, and adaptability to complex architectural features, including interior wall paintings, which are integral to the monument’s heritage value. Particular attention is given to how each technique captures surface texture, color fidelity, and material deterioration. The study also examines performance around intricate architectural elements such as vaulted ceilings, apses, cornices, columns, and carved stone portals, where occlusions, tight clearances, and fine ornamentation challenge coverage and resolution. By evaluating the strengths and limitations of each approach, the research highlights methodological considerations relevant for conservation professionals. The results indicate that the Static TLS is the most demanding workflow, requiring complex total station integration for control and station points. It produced the highest data density, with acquisition rates of one million points per second, making it the most hardware-intensive and difficult to manipulate. UAV photogrammetry provided a balanced middle-ground; it required minimal physical effort during acquisition and produced datasets that were significantly easier to manage. Handheld SLAM LiDAR emerged as the most productive solution for rapid coverage. While the handheld scanner’s image quality was lower than the photogrammetry, it still provided enough detail for the structural assessment and documentation needed. Although the point cloud lacked the extreme geometric detail provided by the TLS, the FARO Connect software made georeferencing and data manipulation significantly more efficient. Full article

The dynamic response of ancient multi-drum columns, commonly found in historical monuments, is characterized by complex nonlinear mechanisms including rocking, sliding, and wobbling. Unlike modern monolithic columns, these structures consist of large, unbonded stone drums that rotate and interact dynamically during ground motion, resulting in highly nonlinear behavior due to intermittent impacts and evolving contact surfaces. The objective of this study is to evaluate the influence of the friction coefficient at the interfaces on the dynamic response of multi-drum columns. Two structural configurations are considered: (i) simple free-standing multi-drum columns, and (ii) multi-drum columns connected with iron dowels, replicating ancient Greek construction techniques. The columns analyzed are representative of the colonnade system of the Gymnasium of Ancient Messene, Greece. Sinusoidal base excitations with varying characteristics are applied, and parametric study is conducted by varying the interfacial friction coefficient. The results indicate that in the first configuration, low friction promotes interfacial sliding, leading to enhanced energy dissipation, a softened rocking response, and a reduced overturning frequency range. In the second configuration, variations in friction have a limited effect on the collapse frequency range, because at lower friction levels strong excitations lead to dowel reinsertion failure over a wide frequency range. Full article

Porous stones are widely used in historical constructions and represent a major component of built cultural heritage. Their conservation commonly depends on multiple single-function products, such as consolidants, hydrophobic agents, biocides, or cleaning agents, which are often toxic and environmentally burdensome. This study performs an environmental assessment of a novel multi-function product designed for the sustainable conservation of porous stones and compares it with other conservation treatment alternatives. This product integrates green chemistry and nanotechnology through a water-based alkoxysilane modified with layered double hydroxide (LDH) particles. Laboratory and field tests on Portuguese monuments demonstrated suitable technical performance, including high substrate compatibility, effective consolidation depth, durable hydrophobicity, biocidal effect, and minimal visual alteration. To evaluate its environmental performance, a life cycle assessment (LCA) was carried out, from cradle-to-grave. The system boundaries encompassed production, application, and transportation stages, with 1 m² of treated sandstone surface as the functional unit. LCA was performed using CML-IA and ReCiPe methodologies in the SimaPro software. The results revealed the extent of environmental impacts of the novel product, addressing the multi-function strategy compared with conventional products and treatment scenarios. They identified critical life cycle stages for improvement to further enhance environmental performance across scenarios, particularly the influence of perfluorodecyltrimethoxysilane on the environmental burden of the novel product. Overall, this study demonstrates the value of LCA as a design and decision support tool for developing sustainable, multifunctional materials for cultural heritage conservation. Full article

Dispersed archaeological landscapes are often rich in heritage value but weakly integrated into regional tourism systems. This creates difficulties in visitor orientation, interpretive continuity, and conservation-sensitive tourism planning. In response to this problem, this study examines the Adana–Kozan–Anavarza axis in southern Türkiye and proposes a spatial corridor framework for organising tourism development within a dispersed archaeological landscape. The research integrates spatial accessibility assessment, service-capacity evaluation, field observation, and sequential route design in order to establish a hierarchical gateway–transition–anchor configuration. Anavarza, one of the largest archaeological complexes of Cilicia, represents a monumental urban heritage site and a biocultural landscape situated within a Mediterranean ecological zone historically associated with Pedanius Dioscorides. Although current visitor volumes remain moderate, official statistics indicate a substantial increase in annual entries between 2022 and 2024, reflecting rising destination visibility. This emerging growth trajectory underscores the need for proactive spatial governance mechanisms prior to the onset of congestion and environmental degradation pressures. The findings suggest that Adana can function as a metropolitan gateway, Kozan as an intermediate staging node, and Anavarza as the archaeological anchor within a realistic multi-day visitor sequence. In this configuration, visitor functions are distributed across multiple nodes, while the ecological and archaeological sensitivity of the anchor landscape is more cautiously managed through spatial sequencing. Rather than proposing a predictive model, the study develops and assesses a context-responsive spatial planning framework grounded in accessibility, infrastructural feasibility, and conservation-sensitive visitor distribution. Beyond the local case, the study offers a transferable hierarchical staging logic for corridor-based heritage planning. Full article

Black Modernist architecture offers a powerful yet underexamined pathway for advancing restorative capacity in American cities. This paper argues that Black Modernism functions as a restorative design methodology, addressing social, economic, and ecological harm imposed on Black communities through slavery, racial capitalism, urban renewal, and infrastructural violence. Grounded in the restorative economics framework pioneered by O’Hara, the paper explores the role Black Modernism plays in sustaining sink capacities defined as the social, ecological, and emotional processes that absorb stress, pollution, waste, and trauma. Conventional economic models ignore these capacities, despite their necessity for economic productivity. Black communities, like all marginalized communities, have historically been forced to provide them without compensation. Situating Black Modernist architecture within this framework, the paper demonstrates how Black architects have designed buildings and landscapes that restore dignity, memory, health, and cultural identity, thereby expanding community sink capacities. Drawing on the works of various scholars, the paper examines case studies from Washington, DC, Atlanta, and Chicago, which reveal how Black communities have borne the burden of unremunerated restorative labor while shaping the American built environment. The paper positions Black Modernism as both a design language and a political–economic intervention, challenging architectural value systems that privilege monumental production over community restoration. It concludes by proposing a Restorative Design Framework that integrates Black Modernist principles with restorative economics, offering policy and planning pathways that recognize cultural labor, emotional restoration, and community well-being as essential components of sustainable urban development. Full article

Founded in 1703, St. Petersburg was the capital of the Russian Empire. Its historic center and associated monuments are inscribed as a UNESCO World Heritage Site. Its components are classified as cultural rather than natural or mixed. We hypothesized that a part of them has an additional ecotourism value. We carried out field observations along with a review of the literature. Our results confirmed the hypothesis: many of these sites retain important elements of biodiversity that can be used for environmental education. Large congregations of birds can be observed in close proximity to Heritage monuments. Wintering bats occupy the interiors of historic fortifications, and in summer, concentrations of feeding bats can be found nearby. Seal haul-out sites have been documented on small islands near the city. The ecotourism and nature-conservation value of these Heritage landscapes is usually linked to the original logic of their selection. The best locations were chosen for palace construction—dry, scenic areas with fertile soils suitable for park creation. Proximity to bodies of water was equally important, both for aesthetic reasons and for sanitation. These same qualities also make such areas highly favorable for biodiversity. Even after centuries of development, many natural features have persisted. Full article

The article presents the preliminary data from the excavation of the Azurrague 1 Dolmen (Ourém), carried out within the MEDICE II project, highlighting the importance of its location in a karstic landscape marked by a strong tradition of funerary cults in natural cavities. The dolmen structure features a heptagonal chamber and a short passage, with ritual deposits that include macrolithic tools, polished axes, ceramics, and human remains dated between the beginning of the Late Neolithic and the Middle Chalcolithic. The data indicates practices of secondary burial, continuity of regional lithic traditions, and a symbolic integration between exogenous architectural forms and endogenous ritual content established in caves. The proximity to caves with contemporary chronologies, such as Lapa da Furada, reinforces the coexistence of differentiated yet interconnected ritual spaces. Analogies with the Rego da Murta Megalithic Complex, caves and other sites in the Alto Nabão region support the hypothesis of a hybrid, long-lasting cultural system in which megalithic monumentalization is associated with ancestral symbolic practices. Full article

This research establishes a high-fidelity documentation framework utilizing multi-sensor 3D data to support critical decisions regarding the conservation and preservation of monuments in urban environments. Focus is placed on the Morosini Fountain, Heraklion, Crete, a 17th-century monument facing significant deterioration due to environmental stressors, material-specific decay of limestone and marble, and cumulative historical interventions. Placed within the context of contemporary cultural heritage management, the research establishes a high-fidelity 3D digital representative to support interdisciplinary documentation and a decision-support framework for restoration. The methodology employs handheld structured light scanning for high geometric accuracy with close-range digital photogrammetry to ensure high-fidelity color acquisition. Strategic semantic segmentation of the monument into architectural components—such as lobes, lions, and basins—facilitated large scale dataset management and optimized alignment procedures under challenging urban conditions, including intense direct sunlight and active water flow. Results include the delivery of metrically accurate multi-resolution models and 2D orthographic products. Quantitative pathology mapping successfully identified extensive affected surface areas on specific panels, while multi-scale geometric morphological analysis effectively identified high-complexity surface areas, which were subsequently classified as either intentional artistic form or active decay through expert visual assessment between intentional artistic form and active alveolar erosion or exogenous accretions. The study concludes that this enhanced digital model serves as an indispensable tool for sustainable management, transforming passive records into active predictive simulations. The implementation of multi-sensor 3D data provides the essential evidentiary basis for high-stakes conservation decisions, demonstrating that comprehensive digital recording is vital for the resilience of urban heritage landmarks. Full article

Greece exhibits a continuous and exceptionally well-documented tradition of water management extending from prehistoric times to the modern era. This review critically examines the evolution of Greek hydro-technologies within their historical, environmental, and socio-political contexts, highlighting their enduring relevance to contemporary water resource management. Beginning with the advanced hydraulic systems of the Minoan civilization, the study traces the development, transformation, decline, and rediscovery of water management practices across successive periods, including the Mycenaean, Classical, Hellenistic, Roman, Byzantine, Venetian, Ottoman, and modern Greek eras. The analysis is based on a synthesis of archeological evidence, historical sources, and technical studies from approximately 200 documented sites throughout Greece. Particular emphasis is placed on water supply, drainage, sanitation, irrigation, and governance systems, as well as on periods during which hydraulic knowledge was partially lost and later reintroduced or adapted. Representative case studies illustrate the spatial and technological diversity of Greek hydro-technological solutions, ranging from monumental aqueducts and dams to decentralized cisterns, wells, and communal irrigation systems. The review demonstrates that Greek hydro-technologies consistently integrated technical innovation with environmental adaptation, social organization, and institutional regulation. This diachronic synthesis provides transferable lessons for modern water governance, infrastructure resilience, and climate adaptation, offering a conceptual framework for addressing contemporary challenges related to water scarcity, climate variability, and sustainable water management in Mediterranean and semi-arid regions. Full article

Religious buildings such as synagogues, churches, and mosques, which are central to religious, cultural, and social life, have served important purposes throughout history as sacred spaces where art, architecture and performance converge. Although these sacred spaces offer unique spatial contexts that deepen individuals’ spiritual experiences through their physical, symbolic, and atmospheric qualities, empirical studies examining this relationship remain limited. This study aims to investigate the impact of biophilic design features within the Yivli Minaret Mosque, one of the oldest Islamic monuments in Antalya, constructed during the 13th-century Anatolian Seljuk Period, on the spiritual experiences of congregation members, and to identify the key psychological mechanisms shaping this relationship. The methodology of the study is based on a mixed-methods approach that combines expert assessments conducted using the Biophilic Interior Design Matrix (BID-M), which integrates proven scientific data with artistic perspective within a historical and symbolic religious structure, with survey data obtained from 359 mosque congregation members. The findings indicate that the mosque exhibits medium-to-high levels of biophilic design characteristics and that the relationship with nature is established indirectly through historical, cultural, and ecological contexts and symbolic representations rather than directly through natural elements. In this respect, the biophilic characteristics of sacred spaces are not merely an artistic and aesthetic approach, but an element that supports individuals’ relationship with nature and their restorative and spiritual experience. Overall, the study reveals that spiritual experience cannot be considered independently of its spatial context and that sacred spaces related to nature support spiritual experience. Full article

The monitoring and conservation of built heritage is a major challenge for the scientific community, given the continuous degradation caused by natural, anthropogenic and climatic factors. The generation of high-resolution 3D documentation is important in the diagnosis of deterioration in historic buildings and the planning of conservation and restoration efforts. The present study proposes an integrated, multi-source workflow combining terrestrial laser scanning (TLS), unmanned aerial vehicle (UAV) photogrammetry, and 3D camera interior scanning. This workflow was employed to document and evaluate the Casa Rusănescu monument in Craiova, Romania. The following processes were incorporated: coordinated acquisition, processing, alignment, evaluation of geometric consistency and deviation-based diagnosis. The diagnosis process include measuring the distance between data clouds and analyzing surface roughness, curvature, planarity and linearity. The workflow was designed to be applicable in real urban conditions, ensuring the coverage of façades, interiors and roof structures. The final, combined dataset contained over 235 million points and includes both interior and exterior geometries. This process helped identify various types of damage, such as cracks, exfoliation, plaster detachment, moisture-related changes, and geometric deformations. An additional AI-assisted validation step (Twinspect) was used to cross-check the degradation indicators derived from point-cloud analyses. The findings suggest that using multiple sensors improves spatial completeness, enhances anomaly detection, and establishes a reliable baseline prior to restoration interventions and long-term monitoring. This methodology facilitates the development of digital twins and GIS-based risk assessments, thereby providing a scalable solution for heritage preservation. Full article

The presence of lithobionts has historically been associated with biodeterioration, posing significant challenges to the conservation of culturally and historically significant stone heritage. This perception stems from abundant evidence of their role in biogeophysical processes, such as mechanical disruption of stone structures, and biogeochemical processes, which chemically alter stone composition through metabolic activity. These processes, while integral to natural systems, often accelerate the weathering and deterioration of heritage materials. Coupled with the aesthetic impact of lithobiont growth, frequently resulting in discoloration or obscuring of intricate details, such effects have justified the widespread removal of these organisms from heritage surfaces. However, recent research has revealed a far more nuanced picture. These communities can enhance biodiversity, contribute to the perceived authenticity of aged monuments, and, in some cases, form a biological layer that shields stone from pollutants and weathering forces. Moreover, developments in biomediated conservation approaches, such as biocementation and biocleaning, highlight their potential as sustainable allies in preservation. This dual role of lithobionts—both as friends and foes in preservation—is central to this review. This review focuses on how these organisms—with a particular emphasis on fungi, often perceived as enemies of conservation—may also serve as unexpected partners in safeguarding our stone heritage, emphasizing the need for case-by-case evaluation of active communities and their environmental context. Full article