The New Castle, or Castello Nuovo, was constructed between 1350 and 1375 on the initiative of the  House of Visconti.
The Visconti family, already lords of Milan, in 1335 acquired also Valtellina after defeating the commune of Como.

The Castello Nuovo was designed as a stronghold, adapted to the strategic needs of the 14th century.
It was surrounded by a double defensive wall, had a solid keep and a fortified internal tower (Bergfried) as an ultimate defense structure.
The southern part of the castle is built directly on the steep of the Castle Hill, while the north end, in contrast, had a moat.
The fortress was never involved into fighting action.
As early as in 1526 the Castello Nuovo was partially demolished by the new lords of the Valtellina to avoid possibilities of any kind of insurrection.
Some years before in 1512 the three counties Chiavenna, Valtellina and Bormio became part of the Three Leages (the Grisons) with the status of a subordinated land.
The New Castle, or Castello Nuovo, was constructed between 1350 and 1375 on the initiative of the  House of Visconti. The Visconti family, already lords of Milan, in 1335 acquired also Valtellina after defeating the commune of Como.
The Castello Nuovo was designed as a stronghold, adapted to the strategic needs of the 14th century. It was surrounded by a double defensive wall, had a solid keep and a fortified internal tower (Bergfried) as an ultimate defense structure. The southern part of the castle is built directly on the steep of the Castle Hill, while the north end, in contrast, had a moat. The fortress was never involved into fighting action. As early as in 1526 the Castello Nuovo was partially demolished by the new lords of the Valtellina to avoid possibilities of any kind of insurrection. Some years before in 1512 the three counties Chiavenna, Valtellina and Bormio became part of the Three Leages (the Grisons) with the status of a subordinated land.
Rock Engraving Park of Grosio