Trezzo sull'Adda

Trezzo sull'Adda is a comune (municipality) in the Province of Milan in the Italian region Lombardy, located about 30 kilometres (19 mi) northeast of Milan on the Adda River.

The Naviglio Martesana canal starts from the Adda in Trezzo's territory.

Trezzo sull'Adda borders the following municipalities: Cornate d'Adda, Bottanuco, Capriate San Gervasio, Busnago, Grezzago, Vaprio d'Adda.

Trezzo received the honorary title of city with a presidential decree on 8 July 2008.

Main sights

Trezzo's main attraction is the massive castle which belonged to the powerful Visconti family in the 14th century. Protected by the Adda on two sides, it had a 42-metre (138 ft) high square tower on the third one. Its fortified bridge (see Trezzo sull'Adda Bridge) was 72 metres (236 ft) long, the longest bridge span for several centuries, built on three different levels, passing 25 metres (82 ft) over the waters.

Due to its strategic position, the castle was contested first by Emperor Frederick Barbarossa and Milan, in the 12th century, and later by the Visconti and the Torriani families. The castle was destroyed or burnt several times, but was rebuilt on each occasion. The last reconstruction dates from 1370. It was commissioned by Bernabò Visconti, who was later imprisoned there until his death.