Computer vision methods and rock art: towards a digital detection of pigments

A non-invasive procedure for assessing and interpreting the pigments of rock art paintings through computer vision and photogrammetric techniques is presented. The method is designed to document and interpret poorly preserved pigments by making use of advanced techniques of photogrammetry and computational imaging. Two different software solutions that were developed by the authors have been used for this purpose. Finally, two case studies of rock art paintings from Spain have been analysed, which show the reliability of the method.     

CHARACTERIZATION AND PROVENANCE OF LIME PLASTERS FROM THE TEMPLO MAYOR OF TENOCHTITLAN (MEXICO CITY)

In this work, we present the results of the analyses of 20 lime plaster samples taken from the Templo Mayor (Great Temple), the main pyramid of Tenochtitlan (Mexico), the ancient capital of the Mexicas. The samples were analysed to recover information on the mixtures used in the fabrication of the plasters and for the provenance of the raw materials (in particular, limestone) used to make the plasters. The characterization of the samples was done by OM, SEM/EDS, XRF and LA–ICP–MS analyses, while the identification of the provenance of raw materials was done by studying the lumps present in the samples with LA–ICP–MS. The objective of the study was to establish if there was a relationship between changes in the construction techniques employed in the pyramid over time and if there were changes in the provenance of the raw materials. Six different construction phases of this pyramid are analysed, showing the similarities and differences among them, mainly based on differences in the sieving of the aggregates and in the raw materials employed. The provenance studies of the limestone used to make the plasters demonstrated that all the limestone comes from the Tula region.     

ORTHOIMAGE‐BASED DOCUMENTATION OF ARCHAEOLOGICAL STRUCTURES: THE CASE OF A MEDIAEVAL WALL IN PONTEVEDRA,SPAIN

During the completion of the expansion works at the Museum of Pontevedra (Spain), a stretch of about 60 m of the medieval walled enclosure surrounding the historic city centre was discovered. Due to its value as a heritage element, the discovery of this archaeological structure required the implementation of preservation activities and exhaustive documentation so that future generations will be able to know and enjoy this piece of history. This paper presents digital models that reproduce the original structure of the wall using close‐range digital photogrammetry, as well as orthophotos, which thoroughly document the dimensional and textural characteristics of the archaeological site. In addition to analysing the accuracy and validity of photogrammetry in the conservation of archaeological heritage, a methodology of data capture, processing and photogrammetry representation is evaluated.     

Archaeology and Climate Change: Evidence of a Flash-flood During the LIA in Asturias (NW Spain) and its Social Consequences

This paper presents the results of a multidisciplinary study of the impact of climate change during the Little Ice Age on a medieval village in Asturias, Spain. The research focused on tracing evidence for a catastrophic flood that buried the village beneath a thick layer of debris, including examining the remains of structures and agricultural land sealed beneath the debris, and considering the social and economic implications of the event in the subsequent history of the area. First, a series of test pits was excavated within the area of the modern village to map the full extent of the damage. Following this, analysis of the stratigraphy, architectural remains, datable artefacts and radiocarbon dating contributed further details, while historical evidence revealed the privatisation of the agricultural land following the catastrophe. The findings offer a snapshot of climate change and its social contexts in a specific, under-studied area with possible implications for the study of risk behaviour and disaster response in currently inhabited areas.     

Spanish Civil War caves of Asturias in archaeology and memory

As the Spanish Civil War drew to a close, retreating Republican troops in the northern region of Asturias took refuge in caves in the mountains from the brutal victor’s justice of the Francoist forces. In this paper we examine three of these caves in the context of the Civil War experiences of the rural municipality of Santo Adriano, based on a combination of archaeological recording and oral history interviews. The paper focuses on the role of the La Ponte-Ecomuseum, a grassroots heritage organisation that has worked to preserve and communicate the tangible and intangible heritage of the district. The Civil War heritage presents cultural, political and practical challenges for the museum: nonetheless it has succeeded in establishing an ongoing programme for its communication and protection.     

Views into the Fragments: An Approach from a Microhistorical Perspective

The approach I call the “singularization of history,” which I have been developing in recent years within the methodological structure of microhistory, is the main subject of this article. It has the precise aim of defining the ways in which scholars can use sources to enter into the past in as detailed and varied a way as possible without becoming trapped within the received channels of the grand narratives. I will make an attempt to demonstrate what the Icelandic School of Microhistory (ISM) is all about and its connection to the scribal culture in the country, as well as the importance of ego-documents for microhistorical analysis. The central element in the analysis of this paper will be the sources themselves—their creation, their context within the events they describe, the opportunities they present for analysis, and in what kind of academic context they have become a subject for enquiry.     

Vikings in Brazil: the Iceland Brazil Association shaping Icelandic heritage

Abstract

The Iceland Brazil Association (AISBRA) was established in 1996 by a group of Brazilians of Icelandic descent, more than 100 years after the first generation of immigrants settled in Brazil in the nineteenth century. The association was the first organisation in Brazil to collectively emphasise and celebrate Icelandic heritage. The association caters to a disparate group of people that had, in many cases, little knowledge about their historical links to Iceland. In spite of the fragmented activities of AISBRA since its establishment, the number of participants has increased, reflecting their growing interest in their Icelandic past. This paper examines how the members of Iceland Brazil Association produce their heritage independently, outside the state recognised heritage, within the Brazilian national context. We analyse how identities are re/shaped in new ways to engage with the past and how values from the past are extracted and turned into contemporary economic, social, and political values. This paper stresses heritage-making as a social imaginary used to define collective identity, which, while based on ancestry, also intersects with ideas of race and class. Representations of their Icelandic heritage allow the members of the Brazil Iceland Association to emphasise their ‘Europeanness’ and thus their associations with whiteness in contemporary post-colonial Brazil.