Présences et déplacements des souverains de la Francie médiane de 843 à 869: Contribution à l'étude de l'espace politique de Lothaire Ier et Lothaire II

This contribution is devoted to the analysis of the movements made by Emperor Lothar I and his son, King Lothar II, by proposing to distinguish between three types of movement: movements at the beginning of the reign, "usual" movements during the reign and movements that would be described as "punctual", of a pendular type. The importance and nature of multilateral meetings between sovereigns is taken into account. This comparison highlights a certain permanence in the use of a stable palatial zone by the two sovereigns, between the Meuse and Eifel on the one hand and a Moselle axis from Thionville to Remiremont on the other, but also, beyond the variety of contexts, similarities in the more exceptional movements, which remain largely concentrated in the Francia media area, a part that fell to Lothaire after the Treaty of Verdun.