This project aims to study on a diachronic way (through Middle and Modern ages), the different original forms of Christianity that were to be found in the « border territories », located on political, religious and linguistic borders, i.e. the lotharingians territories, later on called during the Middle Ages the « inbetween lands » (from the North Sea to Savoy). This territories, along with the Milanese, formed the « catholic Ridge » during the modern era (the border of the catholic influence, between the Protestants in the east and the Catholics in the West). These specificities were asserted often by the historians, but rarely demonstrated, if it is not by case studies. The objective thus is to rethink the explanatory causes and the processes of such a multiplicity and variety of religious experiments, as well as their spread, their successes or failures, while highlighting more efficiently what is due to the circumstances and what is to be credited to the structural phenomenons, linked to the political and religious specificities of these regions. To cover this space and assure a really comparative and transverse approach, an international consortium with 7 historian research teams was established : 4 French teams (the CRULH of Lorraine – coordinator –, the LARHRA of Lyon, the LSH of Besançon, the CREHS of Arras) and 3 foreigners (Transitions of Liège, Institute of history of the University of Luxembourg, History Department of Università degli Studi of Milan). All in all, 37 people are committed in the project, which concerns essentially the history but also assures openings towards the art history and the musicology, to deal with the evolution of the liturgical practices : 12 medievalists, 21 modernists, 2 art historians, 2 musicologists. Given the tremendous size of the region and of the period to be studied, the project will focus on a comparative study of three main topics, by using in particular the methods of the historic anthropology, the gender studies, the prosopography : • The commitment of religious women (specificity of the feminine vocations ; the relations with the male management of the churches ; the feminine writings) : organization of three rounds tables and a final colloquium, with publication of the acts in the form of common synthesis ; three volumes of editions of texts ; on-line publishing and digitalizations of texts ; constitution of a database on these communities. • The pastoral models (episcopal models, formation and skills of the bishops, the organization of the diocesan staff, the legal or liturgical norms’ production, « clericalization » of the Protestant ministers) : organization of three round tables and a final colloquium with publication of the acts ; constitution of a prosopographical database on the episcopal staff (14th-17th c.). • Devotions and politics (promotion and spread of the devotional practices : specific ways of the Marian worship, « political » saints, specific devotion to the angels) : organization of two round tables and a final colloquium with publication of the acts ; one exhibition with realization of a catalog (Museum of sacred art from Fourvière in Lyon) ; on-line edition of an inventory of the editions of a devotion book, "best-seller" during two centuries in the considered region. All the works will give rise to the production of a web site and a global synthesis in the form of a book-atlas, which will contain hundred maps accompanied with long recapitulative notes and with iconography.