Identifying a technological style in the making of lime plasters at Teopancazco (Teotihuacan,México)

The aim of this article is to focus on the technology of archeological plasters at Teotihuacan (Central Mexico), from the Classic Period (200–650 A.D.), focusing in the study of Teopancazco, a neighborhood center in the city. Petrographic and chemical analyses by OM, SEM-EDS, and LA-ICP-MS were conducted to characterize samples from different constructive phases and sectors of the neighborhood center, to determine the provenance of the raw materials employed in the manufacturing (e.g., volcanic glass shards) and to assess whether a shift occurred in the manufacturing of plasters and in the procurement strategies of raw materials during the different phases. The results of the analyses show that almost no changes occurred in the making of the plaster during more than four centuries and allow us to consider the presence of a technological style in their manufacture, which is characterized by the making of plaster by mixing lime with volcanic glass shards, which in the case of Teopancazco were derived from the Altotonga (Veracruz) magmatic system. The data at our disposal suggest that this style was developed in Teopancazco and later introduced throughout the city of Teotihuacan in the Early Xolalpan phase (A.D. 350), although we still do not know whether the provenance of the raw materials is the same. The wide distribution of this technological tradition could be due to the technological properties of the materials and/or the influence of the intermediate elite who ruled over Teopancazco. The paper confirms that the study of material culture and technology sheds light on broader cultural aspects of ancient societies.     

Plasters from Different Buildings of the Sacred Precinct of Tenochtitlan (Mexico City): Characterization And Provenance

In this work, we present the results of the characterization of 20 lime plaster samples taken from the Sacred Precinct of Tenochtitlan (Mexico City), the ancient capital of the Aztec empire. The samples come from different buildings of this precinct (A, B and D) and from the west façade of phase VI of the Templo Mayor pyramid. The objective of the work is to characterize the plaster samples, to understand the raw materials used, and to evaluate the presence of similarities and differences among the samples in the building techniques and raw materials employed. All the samples were studied with OM, SEM–EDS and LA–ICP–MS. The study provided evidence of the plastering and replastering practice in the same constructive phases. The results of the analyses showed the existence of important similarities and differences among buildings and constructive phases in the Sacred Precinct. In order to understand the provenance of the limestone used in the plasters, the lumps and the binder of the samples were analysed. The results were compared with those of the limestone outcrops located in central Mexico. The provenance study showed that all the limestone used in the construction of the analysed buildings of Tenochtitlan's Sacred Precinct comes from the Tula region.     

Characterisation of archaeological mortars from Pompeii (Campania,Italy) and identification of construction phases by compositional data analysis

This work describes the compositional characterisation of coccciopesto and natural pozzolanic mortars sampled in the Regio VI area of the archaeological site of Pompeii, with particular reference to the Casa di Pansa in Insula 6 and Casa 17 in Insula 2. Samples were studied by optical microscopy and analysed by XRF, SEM-EDS, LA-ICP-MS and XRPD. The XRF and SEM-EDS data, subjected to multivariate analysis (cluster analysis), identified the three main construction phases involved in building the Casa di Pansa. In addition, mineralogical and petrographic characteristics of the aggregate were determined and found to be compatible with pyroclastic deposits from the volcano Vesuvius. Study revealed C–S–H phases in the binder, due to pozzolanic hydration phemomena of hydrated lime with cocciopesto and natural pozzalana.     

The dossettiani and the concept of the secular state in the constitutional debates: 1946–7

It is now generally accepted that the members of the Constituent Assembly who were charged with drafting the Constitution concentrated their efforts on formulating the ideals to be expressed in it at the expense of the institutional arrangements of the new Republic. This has generally been viewed as resulting from a combination of two factors: their weak grasp of the liberal principles underpinning liberal parliamentary democracy, and a concomitant error of judgement in assuming that sufficient stress on the ideals of the Constitution would guarantee the basis of a healthy democracy. This article sets out to examine the input of the most influential Catholic group, the dossettiani, and argues, against the error of judgement thesis, that in fact their rejection of the concept of the secular state was a more fundamental denial of important principles of a pluralist democracy than has usually been supposed. The article also places their contribution within the context of the Church's aim to create a ‘Christian civilization’, and further suggests that the model of Catholic Action which inspired its collateral vision of Catholic forces was corrosive of a pluralist vision of correct institutional arrangements. The article ends by suggesting that these factors may have weighed more heavily on subsequent distortions of Italian democracy than has so far been supposed.     

Embalming methods and plants in Renaissance Italy: two artificial mummies from Siena (central Italy)

Knowledge of the embalming methods used in Renaissance Italy comes not only from the literary texts of physicians and surgeons of that period, but also from artificial mummies which have been found. In 1999 two mummified bodies, dated back to the end of 15^th and beginning of the 16^th century, were recovered in a crypt of the hospital chapel of Santa Maria della Scala in Siena (central Italy). The individuals were identified as Salimbene Capacci (1433–1497), Rector of the hospital, and his wife, Margherita Sozzini (?-1511). The mummies were submitted to autopsy and paleopathological examination, which included Computed Tomography. Palaeobotanical and palynological analyses were performed on the vegetable materials and plants used to fill the body cavities. This study was carried out with a multidisciplinary perspective, that allowed us to reconstruct the embalming techniques and substances used for mummification. The results are compared with the evidences provided by other mummies and embalming handbooks of that time.     

Ideological uncertainty and the path of convergence: the impact of the 1970s in France and the UK

This article looks at the fracturing of certainties that began in the 1970s, at the end of the period described as ‘les trente glorieuses’ in France, but a period that was also, to a more modest extent, a period of economic expansionism and intellectual optimism in the UK. At the level of political discourse and policy options, the economic crisis of the late 1970s prepared the ground for a marked divergence between France and the UK: on the one hand, the ‘socialisme aux couleurs de la France’ that was to characterise the ambition of the socialist years under François Mitterrand, and on the other, a return to the corner-shop capitalism of thrift and endeavour that was at the heart of Margaret Thatcher’s remedy for the UK’s ills. Looked at, however, from the perspective offered by theories of convergence, underlying that manifest divergence was a deeper gravitational pull to the same path as both countries endured the loss of old ideological certainties and grappled, as we shall argue, with a new ideology that is no less powerful and ubiquitous for refusing to declare itself as such.     

Thermographic Survey at Hagia Sophia: Main Arches,Pendentives and Tympana

Hagia Sophia is one of the oldest and most complex existing monuments. Many unanswered questions are still open on the historical and constructive evolution of this monument. The boundaries between the different construction phases and the details of the masonry and materials used in the various phases are still not defined with precision.

The thermographic survey, carried out inside the monument, made ??it possible to answer some of these questions by specifying the exact location of the past interventions and the variability of the materials employed allowing a better understanding of the constructive history of the monument. The technique was applied at a great distance and in normal environmental conditions, taking advantage of the high thermal sensitivity of the instrumentation. The results achieved confirm the validity of the technique in the study of ancient buildings.     

Provenance of glass shards in archaeological lime plasters by LA-ICP-MS: implications for the ancient routes from the Gulf of Mexico to Teotihuacan in Central Mexico

We present the chemical characteristics of samples collected from the central courtyard of Teopancazco, a neighbourhood centre in Teotihuacan (Mexico), the most important classic Mesoamerican city. The rhyolitic glass shards used as aggregates have a composition comparable to the glass material sourced from the magmatic system of Altotonga (located along the route to the Gulf Coast). People travelling from the Gulf Coast may have transported the glass shards to Teotihuacan during the Xolalpan phase (350–550 AD). However, the reasons for using glass shards as a construction material remain unknown. These new data confirm the close relationship between inhabitants of Teopancazco and the Gulf Coast already revealed by previous archaeological and archaeometric studies.     

Georadar investigations in the central nave of Hagia Sofia,Istanbul (Turkey)

Within an interdisciplinary project to study Istanbul’s Hagia Sofia, a georadar survey was carried out in the central nave to assess if the deformations of the structure previously observed could be related to a differential behavior of the subsoil caused by architectural remains underneath. This study faces an unusual challenge since it was necessary to study the space beneath the scaffolding placed for the restoration works. The survey of the central nave was successful and allowed the detection of remains of walls that probably formed the basement of a previous 18- by 22-m structure. In addition, another interesting feature was discovered 2 m below the marble mosaic in the southeastern part of the nave. Although it is not possible to define its function, it seems that there could be a close relationship between this 2- by 3-m buried structure and the marble mosaic in the floor surface. Although some structures were identified under the floor of Hagia Sofia, there are no major changes in the topography of the central nave floor.     

Compositional Analyses of Mortars from the Late Antique Site of Son Peretó (Mallorca,Balearic Islands,Spain): Archaeological Implications

The paper presents the mineralogical, petrographic and chemical analyses of mortars from an Early Christian complex found in Mallorca (Balearic Islands) and dated to between the fifth and the eighth centuries ad . We characterized several mortars found at the site, in order to gather information on the raw materials used, as well as on the technology of production, and similarities among the samples. The analyses were aimed at solving specific archaeological questions regarding the building phases of the site and, in particular, the synchronic or diachronic presence of two baptismal basins in the same Christian complex.