Between 1090 and 1157, the date of the introduction of a system of provostships, two important changes signal a turning point in the history of the cathedral chapter of Barcelona: on the one hand, the breakup of integral administration of the demesne, with the appearance and spread of ecclesiastical "fiefs" (later benefices); on the other, the formation of independent patrimonies linked to the chapter of canons and to the bishop and archdeacon. This article offers a sketch of the history and the causes of these two closely interrelated developments.[fr] Entre 1090 et 1157, date de l'instauration du système des prévôtés dans le chapitre de la cathédrale de Barcelone, deux changements importants marquent un tournant dans l'histoire de cette i...