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Texte remanié de: Thesis M.A.--Local history--Cardiff--University of Wales college, 1990.

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Le processus d’européanisation des élites aristocratiques au pays de Galles aux XIIe et XIIIe siècles constitue le point de départ de cette étude. L’objectif est de saisir les mécanismes de la réception de la culture aristocratique continentale par la noblesse autochtone ainsi que la sélection et l’adaptation de certains modèles culturels gallois par l’aristocratie anglo-normande. Ces mécanismes sont analysés à travers le prisme de l’abbaye de Margam. Elle est considérée comme un potentiel « espace de rencontre », inhérent au processus d’interculturation des élites aristocratiques du Glamorgan du milieu du XIIe siècle à la fin du XIIIe siècle. La production scripturaire de l’abbaye de Margam, fondée en 1147 par le comte de Gloucester, offre un riche corpus documentaire qui permet de dresser le portrait de l’aristocratie laïque du Glamorgan.Le portrait qui se dégage de cette étude reflète une aristocratie laïque aux multiples facettes. Malgré une hétérogénéité culturelle et sociale se dessine la naissance d’une identité catégorielle commune aux élites aristocratiques. Acquérant un rôle d’agents de transition et de transformation, les cisterciens ont répondu aux besoins spirituels des nobles gallois et anglo-normands qui recherchaient l’intercession de la Vierge afin de réussir leur salut. Anticipant toute contestation aux transferts de propriété, le monastère a sécurisé les transactions en s’adaptant aux usages propres aux grands laïcs du Glamorgan. Cette reconnaissance des pratiques de l’aristocratie locale n’a pas évité l’éclatement de conflits, parfois violents, souvent résolus devant la cour comtale du Glamorgan. Cette dernière apparaît alors comme un second « espace de rencontre » du processus d’interculturation.En tant qu’« espace de rencontre », l’abbaye de Margam a contribué au processus d’européanisation qui a touché l’aristocratie galloise du Glamorgan. Cependant, ce concept présente des limites. L’européanisation des nobles autochtones n’a pas été complète, car ils ont conservé leur héritage culturel. Il laisse également dans l’ombre le processus inverse. L’adaptation et la sélection de modèles culturels gallois par l’aristocratie anglo-normande mettent donc en lumière le processus d’interculturation des élites du Glamorgan aux XIIe et XIIIe siècles. / The process of Europeanization of aristocratic elites in Wales in the twelfth and thirteenth centuries is the starting point of this study. It aims at understanding the mechanisms underlying the reception of the Continental aristocratic culture by the local aristocracy as well as the selection and adaptation of some Welsh cultural elements by the Anglo-Norman aristocracy. In order to grasp these mechanisms, this study revolves around Margam Abbey. It is considered as a possible “meeting place”, inherent to the process of interculturation of the Anglo-Norman and Welsh aristocratic elites from the mid-twelfth century to the end of the thirteenth century. The written production of Margam Abbey, founded by the earl of Gloucester in 1147, gives a rich corpus to draw the portrait of the lay aristocracy in Glamorgan.The portrait made in this study is representative of a multifaceted lay aristocracy. In spite of a cultural and social heterogeneousness, the birth of a common class identity to the aristocratic elites draws. Obtaining a role of agents of transition and transformation, the Cistercians answered the spiritual needs of the Welsh and Anglo-Norman nobles, all seeking the Holy Virgin intercession in order to win their salvation. In order to prevent any claim to transfers of property, the monastery secured the transactions by different adaptations to the specific practices of the lay aristocracy of Glamorgan. This recognition of the aristocratic particularities did not avoid the breaking of conflicts, sometimes violent, often settled before the county court. This latter appears as a second “meeting place” of the process of interculturation.As “meeting place”, Margam Abbey contributed to the Europeanization impacted the lesser Welsh aristocracy in Glamorgan, who adapted to the Continental models. However, this concept presents some significant limits. The Europeanization of the native elites was not complete, because they kept their cultural inheritance. It does not also shed light on the reverse process. So, the adaptation and selection of Welsh cultural elements by the Anglo-Norman aristocracy highlight the process of interculturation of the aristocratic elites in Glamorgan.

<p> Glamorgan township in southeastern Ontario, is underlain by Precambrian rocks of the Grenville province. Prominent amongst these are migmatite, paragneiss, and granite gneiss, VJhich collectively form a series of rocks (the Glamorgan gneiss aeries). </p> <p> Field work revealed that this series is completely gradational from a geological aspect, and that the geological gradation is complemented by a geochemical gradation. <p> An explanation of these gradational relationships constitutes the main contribution of this study. The conclusions reached are that partial melting of paragneiss produced migmatite and a trondhjemitic melt, which later produced granitic (in the strict sense) derivatives. </p> <p> In developing the main conclusions, a number of subsidiary problems are discussed, chief of which are the possible metavolcanic or metasedimentary o'rigin of the paragneiss and the possible origin of so-called diorite as a differentiate of an alkaline gabbro. Metamorphism was concluded to be of Miyashiro's low pressure intermediate type. </p> <p> By the use of experimentally determined reactions and stability fields a metamorphic grid was devised, which led to the following upper limits of metamorphic conditions: 550 to 650°C and 3 to 6.5 kilobars total pre5sure. These estimates in turn lead to the following limiting geothermal gradients: 25 to 55°C per kilometre. </p> <p> The Glamorgan occurrence was found to share three characteristics with many other Precambrian terrains : 1. migmatisation and emplacement of granite accompanied high grade metamorphism; 2. an early sodium-rich granite was followed by a more potassic one; and 3. the more sodic granite is associated with a small amount of basic igneous rock. These three generalisations were used to formulate a possible model for deep crustal petrogenesis. </p> / Thesis / Doctor of Philosophy (PhD)

This thesis has set out with the intention of providing a detailed investigation of the pattern of urban development which occurred in the lordships of Glamorgan, Gwynllŵg, Caerleon and Usk between 1217 and 1314, The reason for concentrating upon the period 1217-1314 is that it was during this time that each of the four lordships passed into the hands of a single baronial family, the Clare earls of Gloucester and Hertford. A central theme of the thesis has been to obtain an understanding of the way in which urban development as a whole evolved during this period, with particular emphasis being placed upon the role played by the Clare seigneurs in shaping these developments. This question of seigneurial involvement is important, and sets the study apart from previous investigations into urbanisation in the four lordships. Whilst the individual development of towns within the lordships has generally received a fair amount of historical and archaeological investigation, very little attempt has been made to examine how the towns might have been interactive and interdependent in terms of administration and economic development when under the control of a common lord. In the course of this thesis consideration has been made of the development and evolution of the towns of Cardiff, Newport, Kenfig, Neath, Caerleon, Usk, Cowbridge, Trelech, Llantrisant and Caerphilly, and important aspects regarding the respective influence of the seigneur and the burgesses have been identified. In all the towns held by the Clares, it emerges that it was the seigneur who represented the dominant force in shaping urban development. Moreover, strong evidence has emerged to suggest that the Clares adopted and implemented a homogeneous attitude towards the development of urban centres in their Marcher lordships.