The Visconti Castle in Cusago was built in the 14th century by Bernabò Visconti and used as a hunting lodge by the Visconti family, lords and dukes of Milan. The castle underwent significant changes in the Renaissance period. Today it is in a state of abandonment.
The castle of Cusago had been attended since 1369 by the court of Bernabò Visconti and after his removal from power in 1385 by his nephew Gian Galeazzo. Between 1425 and 1440 the Duke Filippo Maria Visconti devoted great attention to the castle and to the surrounding park. His mistress Agnese del Maino lived occasionally there. In 1438 a little canal (the naviglietto) was excavated to connect the castle to the nearby Naviglio Grande.
During the Ambrosian Republic (1447-1450) part of the buildings were demolished. The function of the castle as a country villa for hunting and parties was restored by Ludovico il Moro. In 1496 he hosted the emperor Maximilian I.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.