The Castle of Trezzo sull'Adda is located on a hill within a bend of the Adda river and from this protected on two sides. On the remaining side it is closed by a wall and a 42-meter high tower. Part of the castle was the fortified bridge over the river, destroyed in 1416.
The site was inhabited since prehistoric time by Celtic populations and after the VII century hosted a Longobard settlement, which was also at the origin of the first fortification on the hill. In 1370 Bernabò Visconti, lord of Milan, ordered the construction of a new caste, which was built on the remains of the previous fortress and completed in 1377.References:
Castel del Monte, located in the municipality of Andria, rises on a rocky hill dominating the surrounding countryside of the Murgia region. A unique piece of medieval architecture, it was completed in 1240. The castle’s location, its perfect octagonal shape, as well as the mathematical and astronomical precision of its layout all reflect the broad education and cultural vision of its founder, Emperor Frederick II.
As a leader of modern humanism, the Germanic Emperor brought scholars together in his court from throughout the Mediterranean, combining Eastern and Western traditions. The castle’s unique design, an octagonal plan with octagonal towers at each angle, represents a search for perfection. Interior features reflect Eastern influences, such as the innovative hydraulic installation used by Frederick II for bathing in accord to the typical Arabic customs.
The site is of outstanding universal value in its formal perfection and its harmonious blending of cultural elements from northern Europe, the Muslim world and classical antiquity. Castel del Monte is a unique masterpiece of medieval architecture, reflecting the humanist ideas of its founder, Frederick II of Hohenstaufen.