Interconnected Epistyles of Marble Monuments Under Axial Loads

The restoration of destroyed connections of epistyles joined together by means of metallic connectors is among the most difficult problems encountered by scientists working for the conservation/restoration of monuments made of marble. The complexity of the geometry and the interaction of three completely different materials (metal-filling material-marble) constituting the connection render the study (either experimental or analytic) extremely complicated. In this direction a numerical analysis is presented here in order to deeply understand the response of a typical ancient connection subjected to axial loads as well as to quantify the influence of some geometric parameters on its response. The parameters studied include the length of the connector, the width of its flanges, the depth of the groove (mortise), the existence or not of relieving space and the filling material’s volume. The numerical model was calibrated and validated according to the results of an earlier experimental study realized on the worksite of the Parthenon Temple. It was concluded that the interventions required to relieve the stress field by changing the size of the connector are disproportional to the respective positive effect on the response of the connection. Moreover it was proved that the most beneficial parameter is the relieving space.     

The Wadi al‐Hijr (Sultanate of Oman) in the third millennium BC

In 2010–11 a pedestrian survey of the western end of Wadi al‐Hijr in northern Oman identified 1507 archaeological features in a 124 km² area. Data were collected on each feature's architectural characteristics, associated artefact assemblages, topographic and environmental locations, condition of remains, and relations to other archaeological features. The majority of datable features belong to the third millennium BC and divide unequally between the Hafit and Umm an‐Nar periods. While the majority of these third‐millennium BC features were tombs, other feature types were identified, including towers, settlements, quarries, dams, enclosures, and possible platforms. Third‐millennium BC features were organised into clusters and ranged considerably in size, from a few features to several hundred. All of the clusters established during the Hafit period were maintained in the Umm an‐Nar period, suggesting a continuity throughout the third millennium. Some preliminary hypotheses regarding settlement patterns are suggested.     

石质文物病害机理研究

导致石质文物产生病害的因素很多,其中近年来日益加剧的环境污染带来的病害加速问题引起文物保护工作者的广泛关注。精确的病害诊断是文物保护的先决条件,因此,多学科综合研究和新技术不断引进到病害机理研究方面。对各种可能的病害原因从最初的定性分析逐渐转变到定量模拟分析方面。目前,石质文物病害研究从地质勘察、室内试验、现场试验等各个方面展开,但是由于各个试验条件不同,会出现不一致,甚至相悖的结论。在对石质文物病害的研究现状进行了总结后,认为试验体系标准的制定可以使得文物保护工作者的研究具有可比性,从而可以得出较具一般性的结论,这也是进行病害机理研究的基础。由于文物完整性保护的特殊要求,无损检测技术的发展及检测结果的判定是整个的试验体系中一个重要方面。同时,由于室内实验存在时间及尺寸等比例效应问题,室外长期观测试验应是今后的研究方向。最终将病害严重程度及发展趋势的判定和有效预防发展成为一个科学体系。     

Vulnerability Index: A New Approach for Preventive Conservation of Monuments

A new approach is developed for vulnerability analysis of monuments based on a matrix model and the relationships with static and structural factors, climatic conditions, air quality, urban planning and social agents for preventive conservation of cultural heritage in urban centers.

The objective is to provide tools for decision-makers in the current recession to allow them to prioritize strategies for cultural heritage preservation in a town, where territorial policies are applied and regions where restoration budget is distributed. This new tool allows to classify monuments in order to prioritize restoration and is useful in deeper analysis associated to risks assessment.

The degradation of building materials and structures is mainly due to deterioration caused by structural instability, weathering, pollution, and anthropogenic damage. The vulnerability approach of each monument (vulnerability indexes) was calculated, based on a Leopold matrix that depends on intrinsic variables and the life of the monuments. For the very first time, the influence of different deterioration agents has been balanced with a Delphi forecast based on architects’ opinions.

The result is a new pre-Artificial Intelligence tool that enables users to reproduce human reasoning to study relations between vulnerability factors, risk factors, and the historical parameters of the monuments.     

Communism and cultural heritage: the quest for continuity

The purpose of this paper is to discuss the theoretical genealogy and main uses of heritage in actually existing communist countries. This is performed by carrying out a critical review of Èleazar Aleksandrovi? Baller’s Communism and Cultural Heritage, (1984, Progress, Moscow). The analysis of Baller’s work reveals that the logics of heritage in communist countries differed in various ways from capitalist countries, mainly because of the almost total state control over the heritage apparatus and the subordination of heritage policies to Marxist–Leninist ideology. Heritage was fundamental in dealing with the problem of change and continuity with the traditions, narratives and identities of previous society, and in the process of transforming citizens into ‘new men’ through the cultural revolution and the inculcation of ideology through museums and monuments.     

Khmer sandstone quarries of Kulen Mountain and Koh Ker: a petrographic and geochemical study

Sandstone from several ancient quarries and natural outcrops located at the eastern foothill of Kulen Mountain and in Koh Ker, northern Cambodia, has been characterized by means of petrographic analysis, scanning electron microscopy, and geochemical analysis. The samples have been collected during a series of field surveys organized jointly by The Metropolitan Museum of Art and the Authority for the Protection and Management of Angkor and the Region of Siem Reap (APSARA). The data show how the sandstone quarried from these sites is characterized by an overall petrographic and geochemical homogeneity, and is consistent with the upper terms of the Lower–Middle Jurassic Terrain Rouge Formation.     

The Netherlands in the constellation of the eighteenth-century Western revolutions

In the constellation of the eighteenth-century revolutions, the French events have always occupied a dominant position. Consequently the other European upheavals have been considered as being provoked or strongly influenced by France. Yet, the Dutch revolutions in the 1780s and 1790s provide some important nuances to this interpretation. Before the French took over the Bastille, there was already a Dutch revolution with devoted Patriots, speaking about rights of man and constitutions. The Patriots had to flee abroad in 1787. In 1795, thanks to the French Army, they were able to return to their drawing boards, eager to think anew their government and society. This paper investigates how they did it and whether the American and French precedents were so influential after all in the construction of the Batavian Republic.     

Mundane Myths: Heritage and the Politics of the Photographic Cliché

This paper considers the impact of photographic clichés on the management, conceptualization, and experience of heritage. Working along the grain of pejorative readings of ‘snapshot’ photography, this account views the repetitiveness and redundancy of the cliché as a critical point of departure, rather than a cause for reproach. Taking the World Heritage Site of Angkor as a core case study, three intersecting axes of political concern are sketched out to elucidate the broad social, material, and affective implications of clichéd photography for heritage. First, processes of dehistoricization and depoliticization are interrogated in relation to the role certain images play in constructing a mythic sense of the past in the present. This leads directly in to the second strand of analysis, which examines the various ways in which individuals negotiate these myths through the production of their own highly personalized photographic clichés. Here I develop the concept of an embodied politics of heritage photography to grasp the multivalent resonances of tourist clichés in particular. Finally, the implicit and explicit forms of spatial control that permeate sites such as Angkor are examined in relation to the photographic clichés they respond to and help shape.