This is the only part of the Visconti fortifications to have survived the demolition ordered at the end of the 18th century. The triangular-shaped fortified village was completely surrounded by defensive walls from the time of Azzone Visconti.

In the 17th century, the actual castle housed the Spanish garrison mentioned by Alessandro Manzoni in The Betrothed (“I Promessi Sposi”) and occupied an area of about 1,200 square metres. The building faced on one side towards what is now XX Settembre square and on the other towards a fenced-in harbour.

In 1782, as part of the reforms desired by Emperor Joseph II, the military stronghold of Lecco was abolished, allowing the urban development of the centre, and the castle was sold to private owners. The urban and industrial development of Lecco led to the elimination of the bastions during the 19th century and the first decades of the 20th century.

All that remains of the Visconti castle today is the 14th-century tower. On the ground floor are still visible the lodgings of the guards and some stone cannonballs.

The first floor is used as a space for temporary exhibitions produced by local organisations and associations in collaboration with Si.M.U.L. and the Lecco City Council Culture Department.