The Correggio family never managed to keep possession of it for long, and in 1346 they sold it to the Visconti (who constructed a citadel, La Rocchetta, in 1356, of which some remains exist on the east bank of the river, while the later ate du Pont may be seen on the west bank), and from them it passed to the Sforza.
He wrote also Bellum scodrense (1474), on account of the siege of Scodra (Scutari) by the Turks, and Antiquitates vicecomitum, the history of the Visconti, dukes of Milan, down to the death of Matteo the Great (1322).
It is from this epoch that the supremacy of the Visconti, hitherto the unsuccessful rivals of the Guelphic Torriani for the signory of Milan, dates.
He deposed Galeazzo Visconti on his downward journey, and offered Milan for a sum of money to his son Azzo upon his return.
Mercenary troops are said to have been first levied from disbanded Germans, together with Breton and English adventurers, whom the Visconti and Castruccio took into their pay.