Francesco I Sforza
The most important landmark in Cassano is the Borromeo Castle (also known as Castello Visconteo), built around 1000 AD and progressively expanded. In the 15th century, Francesco I Sforza asked architect Bartolomeo Gadio (who also worked on the Milan Cathedral, the Sforza Castle and the Soncino castle) to redesign it extensively. Afterwards, it became the possession of Venetians, Spanish, Austrians, and of the Italian noble families d'Adda, Castaldo, Bonelli and Borromeo.