Abstract
The last session of the lecture offers a provisional assessment of an investigation that resembles the search for a generative grammar of political possibilities in medieval societies, aiming, on the linguistic model, at a transformational theory of statement production. In political matters, these statements are more diverse than we think, but they obey a few elementary rules of transformation, starting from a single source of production that we have hypothesized to lie outside the field of politics, since the paradox of medieval Christianity confers authority on those who admit the unworthiness of power. In terms of the history of power, if the past is the reservoir of solutions detached from their problems, then writing history amounts to reconstituting the problems for which the institutional forms or political practices of which we keep a trace were the solutions.
This last session suggests this, based on the example of podestataire experimentation in the 1175-1185 decade of communal Italy, in which all or some of the regularities evoked in this year's lecture can be found, opening up the possibility of a return to the city.