Castello di Rezzanello, Medieval castle in Gazzola, Italy.

Castello di Rezzanello has a trapezoidal plan with four cylindrical corner towers decorated in cotto and fitted with beccatelli. It stands on the slopes of Monte Bissago, on the right bank of the Luretta stream in the hamlet of Rezzanello, Gazzola. Architect Camillo Guidotti's late 19th-century restoration reshaped the attic band and the tops of the towers.

The first documented mention dates to 1001, and later the castle provided shelter to Guelph forces during their conflicts with the Ghibellines. These power struggles shaped the region for generations.

The castle's name comes from the court of Regiano, recorded in a 1001 parchment and later identified with Rezzanello. From 1938 the Ursuline sisters of Piacenza ran it as the Casa del Divin Cuore, hosting religious conferences and summer holidays with nearby parishes and Azione Cattolica. Since 1996 the Fiorani family has opened it for guided tours, events and ceremonies.

The castle stands on the right bank of the Luretta stream, on the slopes of Monte Bissago, in the hamlet of Rezzanello in the municipality of Gazzola. It is reached from the village, and the surrounding ground is uneven. Visits, events and ceremonies have been organised here since 1996, so check opening arrangements before setting out.

In 1941 the castle became the province's first prisoner-of-war camp, chosen for its secluded position away from bombing targets. About twenty British officers arrived in May 1941, followed by Australian and Indian units, then South African and British officers and finally Greek soldiers until the armistice of 8 September 1943.