Archeologia e Calcolatori 31.2 - 2020

Introduction to the Conference Milano internazionale: la fragilità territoriale dei contesti archeologici

The Egyptian Ministry of Antiquities and the University of Milan collaborate in the protection, preservation and valorisation of the large necropolis surrounding the Mausoleum of the Aga Khan in West Aswan. The first mission has been completed, the second is underway. Director Patrizia Piacentini describes the work and finds from the first mission and the experts from different fields (anthropology, palaeopathology, chemistry, botany, restauration, the computer sciences) that will be deployed during the second phase. Particular emphasis has been given to the historical meaning of the necropolis, in general, and, in particular, of tomb AGH026, which was excavated in 2019. They promise to yield information on the history and international contacts of the population of Aswan during the Late Pharaonic and Ptolemaic-Roman Period. Vicedirector Massimiliana Pozzi Battaglia enumerates some of the particular issues that were encountered from the point of view of conservation and transport. Inside Tomb AGH 026 different conditions were encountered, depending mostly on whether sand had covered a specific spot or not, which conditioned the preservation of the human bodies, cartonnage-making and wooden items and influenced their transportation and storage. Said Mahmoud Abd El-Moneim, General Director of Aswan and Nubia Antiquities Zone and Co-director of the mission at Aga Khan necropolis, widens the scope of the article to address other endangered sites that at present concerns of the Egyptian Ministry of Antiquities. He describes the challenge posed by raising water levels and increased quarrying activity at Kom Ombo, Philae and Bigga, the rock art and palaeolake sites in the Aswan area.

Digital documenting of archaeological evidence represents a crucial tool in the study, preservation, management, and promotion of archaeological sites in remote regions and in fragile landscapes. In fact, in marginal environment, the knowledge related to archaeological heritage can quickly disappear, especially when policies to protect cultural heritage are unreliable or lacking. In the last few decades, archaeological fieldwork has seen the increasing use of Structure-from-Motion (SfM) photogrammetric technique as a tool for mapping and recording archaeological evidence. This technique allows the creation of highly detailed 3D models of archaeological sites, monuments, and artefacts from sets of simple but accurately taken pictures, thus preserving the data for further research or (digital) cultural valorisation. Nowadays, low-cost/commercial off-the-shelf sensors (professional and semi-professional digital cameras and smartphones as well) are widely available and accessible by most of the users operating in cultural heritage documentation. This has made the acquisition of field pictures in archaeological research much more flexible and cost-effective. 3D models obtained from these pictures through photogrammetric commercial software can be scaled with a known-measure providing highly detailed models for archaeological purposes. This enhances the ability of archaeologists to record archaeological features during field surveys and rapidly obtain 3D models. This is especially useful in the case of archaeological surveys carried out in remote and barely accessible areas. In this paper, we present the results of the application of the above-mentioned methods during archaeological surveys in the Sultanate of Oman, where several archaeological features have been recorded through SfM photogrammetry using commercial devices and portable scale-bars. We demonstrate that this is a highly-flexible and fast process to record archaeological heritage in low-accessible or fragile contexts, where a 3D model (with centimetric precision) represents a valuable dataset for further in-lab analysis and cultural dissemination.

Since 2011 an Eritrean-Italian archaeological mission has initiated research and excavation activities in the area of ancient Adulis, an emporium town located along the coast of the Horn of Africa on the Red Sea, in current Eritrea, documented by the sources as early as the 1st century AD and disappeared between the 7th and 8th centuries. The site, due to the historical and geographical context that determined its ancient splendour, invites us to broaden the research field, extending it from the excavation area to the commercial networks that, in ancient times, set in communication the African, Asian and Mediterranean cultures, without neglecting the intermediate scale, necessary to understand the ways in which the settlement was related to the territorial context and its resources. Among the natural resources water, in particular thanks to the presence of the Haddas, a seasonal watercourse that reaches significant flows, was certainly crucial to the development of the town and to the probable agrarian exploitation of its surroundings. Haddas itself was probably the cause of Adulis’ sudden destruction between the 7th and 8th centuries. Today, this watercourse is at same time one of the main resources and one of the major vulnerability factors of this portion of the coast, where the villages of Zula, Afta and Foro live a fragile equilibrium, seasonally endangered by its floods. The same protection of the important cultural heritage constituted by the site of Adulis today, in a way not entirely dissimilar from what happened in ancient times, depends on this balance.

During the past years both the political instability and the uncontrolled economic development in the Middle East caused several threats to the cultural heritage, including widespread looting and destruction of hundreds of archaeological sites, looting of museums, flooding of ancient settlements due to the construction of dams, damages to monuments and sites during armed conflicts. Notwithstanding the ongoing difficult condition of fieldwork, a new phase of archaeological research has begun with projects of landscape archaeology, excavations and extensive surveys carried out especially in Iraqi Kurdistan, allowing a detailed reconstruction of the settlement dynamics and historical development in the trans-Tigridian region, from the prehistory to the Islamic period. A new archaeological renaissance contributing to the process of peace-building through the empowerment of strong ties between the local communities and the cultural heritage.

Tarquinia is a site of high relevance for the themes of this conference, from fragility to internationalisation, which can be explored on evidence gathered through uninterrupted and systematic presence of researchers from the University of Milan, since 1982. The site has attracted interdisciplinary initiatives and scholars from Universities and research institutes throughout Europe and the world. Today the ancient Etruscan city, buffer zone of the UNESCO site (2004), i.e. the necropolis of painted tombs, is threatened by various geomorphological phenomena and by the risk of abandonment of active research, hindered by current legal-administrative conditions. However, the continuity can counteract this two-faced fragility. This research is based on an established tradition and it is constantly renewed, with obvious advantages for the UNESCO site, which is always under the spotlight. The Tarquinian territory is one of the fields in which the interdisciplinary collaboration immediately yields high returns, especially focusing on a complete and defined survey, through the recent acquirements of topographic research (LiDAR, GIS, geophysical prospections) combined with archaeological investigation. This includes a thorough study of how the ancient city is integrated in the current town plan and in urban planning for the territory: the rules of archaeological, environmental and landscape safeguards the UNESCO Buffer zone vary considerably for specific land plots. However, if on the one hand it is right to think in terms of agricultural development and productivity, this must be done in a way that is respectful of the Etruscan metropolis, whose immense buried archaeological potential is as yet little known.

When performing restoration work, it is not only the technical elements that come into play, but also social, economic and cultural aspects. This approach sees restoration as one continuous flow of ideas and operational plans, based on a fusion of disciplines and on collaboration between multiple players. These players, in various ways and for different motives, all take part in a restoration project, from diagnostics and planning to construction site management and even until the final result can be enjoyed by users, and they do so by constantly respecting the uniqueness of each individual situation. The collaborative relationships and partnerships formed on a restoration site foster a sense of belonging and mutual responsibility. The process of restoration may present a valuable opportunity for the community to come together, offering chances to raise cultural and civil awareness whilst encouraging people to collectively reflect on rediscovering and safeguarding local history. After all, a region may be embodied in a monument which the community can look to in order to identify and recognise themselves. The training of restoration architects is of particular importance in regions frequently affected by natural disasters or where local construction practices are being gradually left behind and traditional ways of living are undergoing radical transformation. If a restoration policy is to be considered conscientious and respectful of local communities, it must actively involve local people in restoration work. Attention should be paid to how these communities may dynamically evolve over time, as well as to the stresses and strains they are under. As such, projects must take account of a multitude of aspects: local cultures, the teaching of co-existence, the evolution of concepts regarding the conservation and restoration of historical and cultural sites and, finally, the remembrance and appreciation of traditions, as these traditions may be both unique and useful in imparting knowledge and providing first-hand evidence of traditional construction techniques.

Sri Ksetra, in Myanmar, is an inhabited archaeological area in which rural landscape, widespread built heritage and archaeological evidences are intertwined with presence of numerous villages. In 2014 the three Pyu cities were named as the first UNESCO World Heritage Site in Myanmar: despite the premises, Sri Ksetra, Beikthano and Halin were not listed as ‘cultural landscapes’ sites but recognized as ‘cultural’ sites. Field research in 2015 highlighted emerging issues in the management and safeguarding of inhabited archaeological sites. The investigation raises critical issues concerning the conservation and management of the rural landscape as heritage, in view of a sustainable development of the site in favour of those who live there.

Ghoufi is located in the Aurès Valley, near the ‘Oued El Abiod’. Its location, next to the panoramic road RN31, is referred to as ‘Balcon de Ghoufi’ because - from above - you can perceive the depth of the canyon (500/1200 m) and the beauty of the place, scattered with Berber villages (vernacular semitrogloditic architecture), terracing, water collection systems, palm groves, orchards and gardens. The Aurès Valley - a thoroughfare since ancient times, a caravan route between the desert and the Mediterranean Sea - has been the subject of archaeological explorations by Pierre Morizot since 1957-1962, which established the chronology of the settlements. This valuable work has been supplemented by ongoing research. This territory still retains the morphological and hydrographic peculiarities that justify the Berber settlement choice despite the fact that unfortunately the places have been abandoned following a recent flood. From 2016 activities of survey and research, directed by the University Badji Mokhtar of Annaba and the Polytechnic of Milan resumed at Ghoufi. These activities are aimed in particular at surveying archaeological and architectural artefacts, conservation interventions to address deterioration and instability and valorisation projects. Since 2017 the research has been funded by the MAECI. The project begun with the collection of documentation and knowledge of the Ghoufi site in a GIS environment. It prefigured a preliminary scenario for its conservation and reuse, following an approach of archaeological sustainability respectful of the characteristics of the site, the territory and the Country.

The history of archaeological computing has long been characterised by the distinction between the application of mathematical and statistical techniques, as part of the so-called movement of quantitative archaeology, and the use of databases and information systems for descriptive and documentary purposes. The intensity of the debate on the relationship between logic and computing, as well as between theory and applications, began to wave in the 1990s. Over time, data integration and new ICT tools have allowed archaeologists to address simultaneously all the issues raised by the archaeological research. This paper focuses on the evolution of methods and techniques in this specific research area, thanks to the analysis of literary sources, the Bibliography of Archaeological Computing, accessible via the Virtual Museum of Archaeological Computing website, and the scientific articles published in the open access international journal Archeologia e Calcolatori.

Since the 1970s, the development of archaeological databases has characterised the history of archaeological computing. The paper presents a summary of the pivotal early projects, with a particular focus on Italy and France, up to the current projects shared online. They are constantly monitored by the international journal Archeologia e Calcolatori, that since 1990 is an observatory of theoretical and methodological aspects of computing and information technology applied to archaeology.

An epigraph is a complex historical document, whose significance is fully acknowledged only if its textual features (script, language, content, etc.) are studied in combination with the contextual information (on the textual support and its provenance). This is the reason why digital epigraphy lies at the crossroads of different disciplines applying ITs to textual and material sources, such as digital philology, computational linguistics, and computational archaeology. The specific interests and methods of those disciplines have exerted an influence on digital epigraphy, which is apparent in the documentary vs statistical approaches applied over time to the electronic treatment of the (re)source ‘inscription’. The aim of the paper is to trace those trends in the application of qualitative vs quantitative methods in the history of studies of digital epigraphy, highlighting the main moments of change, until the most recent developments.

In ancient Western Asiatic studies glyptic has been historically the preferred subject for quantitative experiments and investigations. In most cases this led to stimulating and complex challenges which deserve to be critically discussed and analysed in order to find a proper use in the field of recently developed technologies and models. Cylinder seals in particular compel the scholars to face the close connection between the development of an optimal representation of the artefacts in primary publications and the building of strategies for their quantitative investigation. A synthesis of past experiences and present issues is presented here.

The study of complex archaeological systems through the new Artificial Intelligence and Natural and Neural Computing is a research project which evaluates the historical meaning of the relationships between records of the past as an essentially human construction. It repeats a strong position of Analytical Archaeology, but updates it on the basis of the progress which neurosciences and physics have made in simulating the principles which regulate memory, orientation, classification and mapping of reality. Modelling and simulating the contexts of the past in integrated, parallel, distributed processing through machine learning methods, must make use of a precise encoding of the documents. It takes on an important role in empirical research only when the results produced become the hyper-surface of a network membrane to continue, update, refine or open the analysis itself. After some 30 years of such theoretical, analytical and experimental research, logics, semantics and applications of neural computing maintain their distinct value as a new theoretical approach for the study of dynamic and systemic cultural complexity. They provide a new analytical paradigm for computational modelling in archaeology and an advanced computational method for pattern recognition in archaeometry.

The paper deals with the development of a novel methodology, named ArchaeoBIM, aimed at the creation of digital models representing no longer existing buildings, starting from the available information collected from the archaeological contexts. The process is inferred by the Building Information Modeling used in the contemporary building industry, where different disciplines converge into digital models. The achieved models meet some of the cutting-edge issues of the Virtual Archaeology, i.e. validation, management of data, simulation. These products answer to important needs in the fields of research, conservation and dissemination and could be considered as archaeological records themselves.

The 5G is the fifth generation of networks. It will officially arrive from 2020 to connect millions of devices all over the world with high speed and low latency, to enable advanced projects based on smart technologies, Internet of Things, smart cities and a new generation of smart houses. The use of this new high-speed connection will positively involve, in the near future, the virtual enjoyment of cultural heritage, allowing to offer new and more powerful solutions, especially in the field of immersive VR/AR visualization. On these premises we have carried out a project that aims to virtualize some spaces within the Diocletian Baths through innovative, immersive, emotional and persuasive solutions. The results are based on simple panoramas and 360° VR videos. However, they are enhanced with the stereoscopic vision and, above all, the animation of the scene, thus increasing the “sense of presence” of the user. The immersive visit within ancient spaces is populated with life, human figures and elements that increase the spatiality of reconstruction (sense of scale, presence, verisimilitude).

The inner Sicilian area of the Erei hills, crossed by rivers and important streams directed to the Catania’s lowland, witnessed very ancient human occupation and activities, starting from the Upper Palaeolithic. Here the dynamics of human activities and the organization of the supply basin during early times were distinctive in certain historical periods: some featured a substantial continuity with the earlier phases, while others showed a complete discontinuity with the older human settlement framework and a new organization of the area and activities connected with the environment. These agricultural, proto-urban and urban communities organized their existence on the exploitation of natural resources, distributing themselves according to the local morphology. They built, mostly on top of the hills, constructions used as control viewpoints of the area, and created a complete communication network to connect settlements of the same or different level. Those features in several cases had a long-term continuity that survived to dramatic historical changes and represent today the optimal way for a right perception of current landscape and its millenary history.

The piazza Pozzo Dorico substructures in Cori (the ancient Cora, a Latin city at the north-western slopes of the Lepini Mountains) represent a remarkable example of Roman public architecture of the Late Republican period. They are situated at the bottom of a secular and imposing terracing system, distributed on at least three levels. This paper aims at identifying the modular schemes, geometric shapes and proportions governing the layout plan of this monumental infrastructure, based on recent topographic surveys and new metrological considerations. Finally, it will investigate the relationship between the layout of the archaeological complex (apparently quite simple) and its function (still largely unknown), in order to attempt to identify the several formal and functional components that played a decisive role in the development of the original project.

The Ninfeo Ponari is an ancient building dating back to the first century BC as part of a rich domus, located in the ancient Roman city of Casinum. It consists of two bodies: a rectangular room covered by a barrel vault and an atrium with no roof with a shallow pool in the middle, both paved with mosaics and decorated with wall paintings. The structural condition of the building is critical and its preservation is at risk, as it is located on a hill slope where some substantial sliding activity is occurring. Moreover, it is not protected by an efficient rainfall drainage system. Aim of this paper is to illustrate the strategies and the digital techniques recently applied to initiate a permanent monitoring of the building structural condition.

Starting from the indications derived from the cartographic representation, the goal of the research project described in this paper was to experiment with different tests on the frescoed surfaces of rock-cut architecture for the visualization of the real shape of the subject. For the first time a 3D survey was carried out by the authors in the cave of San Michele on Monte Tancia to test different techniques of processing the numerical models in order to achieve the plane representation of random surfaces, including those with the frescoed plaster. This activity is part of a broader research program related to the investigation of rupestrian architecture, addressing problems of data representation.

The paper deals with the very extensive and complex topic of the conservation and adaptation of the medieval defensive castle of Rocca Janula in Cassino for the headquarters of the non-governmental organization Corvi di Giano. The castle is a very important building due to its location and its history. Its location makes it one of the two landmarks of the city’s landscape. Due to its connections with the Montecassino Monastery, it has a great cultural significance for Poland and Italy. The research described in this paper is an attempt to re-integrate the fortress into social life. The project is an example of the application of digital recording methods such as photogrammetry, HBIM technology and 3D printing. The integration of these methods allowed creating a database by which valorization practices were implemented and conservation guidelines were formulated.

Surveys conducted in the aftermath of recent earthquakes have shown that the structural and anti-seismic performances of historical masonry churches are related not only to structural damages and masonry quality but also to other key features such as effectiveness of connections, damages of wooden elements or criticalities related to humidity. Technical and scientific communities are interested in developing or improving existing procedures for the fast-visual survey and diagnostics in order to measure and analyze all the parameters affecting the building performance. In this paper a new procedure, that can be implemented in a Decision Support System (DSS) based on the Analytic Hierarchy Processes (AHP), is developed to perform a rapid visual survey and diagnostics of masonry building through a set of condition ratings. The originality of the presented work is fourfold: 1) the AHP allows to include in the analysis qualitative and quantitative data such as the quality of masonry and connections effectiveness; 2) the proposed survey and diagnostics performed by suitable condition ratings allow an extensive application in order to identify the most damaged buildings that require more detailed structural investigations; 3) the proposed AHP-based approach is integrated in a DSS to provide a powerful computerized tool, useful to large scale data acquisition; 4) the comparison with a standard diagnostics is performed to validate the procedure and emphasize the advantages of the novel diagnostics.

The aim of this paper is the implementation of a methodological workflow for the diagnosis of masonry settlings, within the HBIM approach, developing a rule-based logical inference tool in Visual Programming Language. The rule-based inferencing diagnosis is a guided process, which increases the confidence factor about settlings and actual causes, on the basis of surveyors’ technical insights and evidences. The final step is the suggestion of appropriate interventions. The results show that inference logic is directly applicable to the diagnosis problem; their efficacy depends on i) the structured parametric and data modelling of decay patterns in the HBIM model and ii) the knowledge base training. The application has been validated on a case study, Masseria Don Cataldo (Bari, South Italy).

The qualitative and quantitative elemental analysis of the unique remains of the Russian nobility of the Middle Ages was carried out in the Frank Laboratory of Neutron Physics at the Joint Institute for Nuclear Research (Dubna, Russia). Neutron activation method was used for experiment. In the course of the research, bones, organics from the skull and hair of seven Russian historical figures who died in the 15th-early 17th centuries were studied. The mass fractions of several elements, including arsenic and mercury (part of the most common medieval poisons) were found in these samples. The comparison of the obtained results with data from similar Russian and European studies made it possible to make assumptions about the probability of the deliberate poisoning of some representatives of the higher Russian nobility. It also gave an opportunity to replenish the elemental composition database of the human remains of that period.