I Visconti di Milano nel secolo 13.

In the belif that the first half of the thirteenth century is the key phase in the establishment of the Visconti seigniory, the paper highlights the crucial role played by its representatives in Milan. These, by holding positions in civil administration and ecclesiastical institutions, increased their prestige, wovw new relations, and broadenes thei sphere of influence. Against this background, the paper focuses on the ecclesiastical careers of Ardengo and Ottone.