La ville antique d’Ammaedara (aujourd’hui Haïdra) est située dans le centre ouest de la Tunisie, à proximité de la frontière algérienne. Nous nous proposons d’étudier dans cette thèse l’évolution de la colonie d’Ammaedara, issue du camp de la IIIe Legio Augusta, depuis sa fondation au Ier siècle après J.-C. jusqu’à la conquête arabe à la fin du VIIe siècle, à partir des données archéologiques et historiques. L’examen de la documentation ancienne (plans, clichés aériens) et l’acquisition de nouvelles données de terrain (relevés topographiques, prospections sur le site et la campagne), nous permettrons d’étudier l’évolution de l’occupation urbaine et rurale ; l’analyse s’appuie sur un SIG (Système d’Information Géographique), qui permet le traitement et l’analyse des données spatialisées. L’évolution de la topographie urbaine (contexte de l’implantation de l’agglomération, occupation et évolution de l’espace urbain, réseau hydraulique, limites urbaines) et le rapport entre la ville et sa proche campagne (limites du territoire, occupation des faubourgs, approvisionnement) constituent nos principales thématiques d’étude. Nous livrons une synthèse sur la longue durée qui dresse l’état des connaissances sur le site et replace dans son contexte régional et historique l’évolution de la ville aux périodes romaine, vandale et byzantine. / The ancient city of Ammaedara (nowadays Haïdra) is situated in west central Tunisia, near the Algerian border. In this PhD, thanks to the archaeological and historical data, we propose to study the evolution of the colonia of Ammaedara, created from the camp of the Third Augustan Legion, from its foundation in the 1st century CE to the Arabic conquest at the end of the 7th century. The examination of the former documentation (plans, aerial photos) and the obtaining of new data (topographic plans, surveys on the site, land surveys) allow us to study the evolution of the occupation of the city and of its countryside. The analysis is based on a GIS (Geographic Information System), which permit the treatment and the analysis of spatialised data. The evolution of the urban topography (context of the city foundation, occupation and evolution of the urban space, hydraulic network, urban limits) and the relationship between the city and its countryside (limits of the territory, occupation of the suburbs, supply) constitute our main themes of study. We deliver a synthesis on the long term which offer a current state of knowledge of the site and replace the evolution of the city in the regional and historical context during the Roman, Vandal and Byzantine period.

La tesi ha lo scopo di individuare le coordinate fondamentali delle dinamiche di trasformazione che la città di Milano conobbe tra il VI ed il XII secolo dal punto di vista topografico, insediativo e monumentale. Attraverso l'analisi combinata di fonti scritte ed evidenze materiali vengono sistematicamente esaminati i quattro principali elementi caratterizzanti il fenomeno urbano in età medioevale: la topografia delle difese, la topografia cristiana, la topografia del potere e la topografia dell'insediamento. / The thesis aims to identify the fundamental coordinates of the transformation dynamics that the city of Milan underwent between the Sixth and the Twelfth Centuries from a topographical, settlement and monumental point of view. Through the combined analysis of written sources and material evidences, the four main elements characterizing the urban phenomenon in the Middle Ages are systematically examined: the topography of the defenses, the Christian topography, the topography of power and the topography of the settlement.

This dissertation studies a local manifestation of ecclesiastical reform in the medieval county of Savoy: the twelfth-century transformation of secular canons into Augustinian regular canons at the church of Sts. Peter and Ursus in the alpine town of Aosta (now Italy). I argue that textual sources, material culture, and the practice of place together express how the newly reformed canons established their identity, shaped their material environment, and managed their relationship with the unreformed secular canons at the cathedral. The pattern of regularization in Aosta—instigated by a new bishop influenced by ideas of canonical reform—is only one among several models for implementing reform in medieval Savoy. This study asserts the importance of this medieval county as a center for reforming efforts among a regional network of churchmen, laymen, and noblemen, including the count of Savoy, Amadeus III (d. 1148). After a prologue and introduction, chapter 1 draws on traditional textual evidence to recount the history of reform in medieval Savoy. Chapters 2 through 4 focus on the twelfth-century sculpted capitals in the cloister built to accommodate the common life of the new regular canons. Several of the historiated capitals portray the biblical siblings, Martha and Mary, and Leah and Rachel, as material metaphors that reflect and reinforce the active and contemplative lives of the Augustinian canons. Other capitals represent the regular canons’ assertion of their precedence over the cathedral canons and suggest tensions between the two communities. The final chapter examines thirteenth-century conflicts over bell-ringing and ecclesiastical processions in the urban topography of Aosta to illustrate how the regular and secular canons continued to negotiate their relationship. Appendices include an English translation of a vita of St. Ursus (BHL 8453). The dissertation as a whole reconstructs the places and material culture of medieval Aosta to convey the complexities of religious and institutional life during a time of reform and beyond. / text