Castello di Monticello, Medieval castle in Gazzola, Italy.

Castello di Monticello is a fortified residence in Gazzola with a rectangular footprint enclosed by four towers, three with round bases and one with a square base. Two interior courtyards sit within these defensive walls and define the castle's internal spaces.

In 1372 papal forces seized the castle during an uprising against Visconti rule while the Arcelli family held control. This moment marks a key shift in the local power struggles of that era.

The chapel beside the castle is Santa Maria Maddalena e Santo Stefano Protomartire, built in the 14th century as the castle's oratory. Its double dedication and position next to the fortified residence show how worship and seigneurial power were linked at Monticello.

The castle is private property housing a working farm, so access is not open to the public. The occupied wings are kept in good repair, while the unused sections are dilapidated and at risk of collapse. The site stands at 540 m on the ridge between the Trebbia and Luretta valleys, reached from the Monticello hamlet of Gazzola.

In April 1945 around 30 partisans successfully held the castle against approximately 400 Nazi-fascist forces during a single engagement. Reinforcements and artillery fire allowed this small group to repel the much larger attacking force.