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.

In Trezzo Sull'adda, beyond the St. Gervaso and Protaso's Provost church, that was built in 1362 but with clear references to the Romanesque style; there are other important places of prayers.

In effect there are: -Cappella dei morti delle cave (The chapel of the Death in the Quarries ) It is considered a consecrated building for locals.

This building, now in precarious condition, has a quadrangular chamber, added in 18th century to the smaller and lower original chapel, along with the altar.

On the simple façade it is possible to notice some parts of an eighteenth-century fresco representing the death in an allegory of vanitas of worldly goods.

For this reason the architect Gaetano Moretti and the engineer Adolfo Covi realized a unique building of its kind which combined technological innovations with a redefined decorative language rich in references to modern style and eclectic architecture.

This research itself of the "fine aspect", demonstrate that Taccani Power Station is one of the best efforts combining engineering and architecture, art and technique.

Unlike other similar plants, the power station in Trezzo has absolutely specific aspects, for instance the lack of the penstock.