Abstract
If the penitence of Canossa provides a glimpse of the moment when Christian humility is reversed into a spectacle of glory, what was the political availability of its memory at the time of the " Gregorian chiasm " ? In this exchange between sacrality and sovereignty, the possibility of a political experience is at stake, or rather, the possibility that there are experiences - a history of powers and not just of the domination of theecclesia, exalted by a certain historiography. We return here to what Pierre Toubert has called " the decisive experience of the Gregorian movement ", attempting to measure its productivity in the light of recent analyses (by Florian Mazel in particular). In legitimizing the idea of novelty, the reformers valued singular experiments, particularly in the genres of religious life. Following Jacques Dalarun's analysis, we take up the case of the eremitical congregation of Grandmont, in its documentary dichotomy(Book of Sentences and Rule). Particular attention is paid to the procedures for electing the prior and building consent, pointing to the " almost all" (" at these words, almost all said in a unanimous voice... ") as a form of political invention, with the monastic community thinking of society from the outside.