La “mutation informal”: A propósito de dos libros recientes sobre el reino itálico (1080-1130)

The political and social changes observed in the Kingdom of Italy be- tween the middle of the 11th Century and the middle of the 12th Century have concentrated, in the last decades, many studies. Studies which have favored some debates on the charac- teristics with which such transformations, and its chronologies, are defined. This article aims to consider two recent works on the regnum Italiae (1080-1130) to observe, through the emergence of the communes and the maturation of the rural lordship, the spaces and lan- guages of change which have developed through the informality of their political solutions.