Castle of Trezzo sull'Adda, Medieval fortress in Trezzo sull'Adda, Italy.
The Castle of Trezzo sull'Adda is a fortress standing on a hilltop within a bend of the Adda River, featuring a 42-meter-high tower and thick defensive walls. The five-sided layout and restored sections display the military construction style of Northern Italy.
Bernabò Visconti, the lord of Milan, ordered its construction between 1370 and 1377 over earlier Celtic and Lombard settlements. This fortification became part of the Visconti family's grip on power along the Adda valley.
The fortress controlled river trade and demonstrates Visconti building methods using both stone and brick in its five-sided design. Visitors can see how the structure displayed Milan's authority over the region through its strategic location and imposing form.
Visitors can climb the tower stairs for views across the Adda valley and explore the restored fortress sections. Wear sturdy footwear as the paths are uneven and some passages are steep.
A fortified bridge with a single 72-meter arch once connected the fortress to the far bank, making it a remarkable feat of medieval engineering. This structure was destroyed in 1416 and today survives only in historical records and archaeological traces.
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