Rocca dei Terzi, Medieval castle in Sissa, Italy

Rocca dei Terzi is a fortified complex in Emilia-Romagna featuring a central tower flanked by residential wings arranged in a symmetrical layout. The structure combines defensive architectural elements with living quarters distributed across multiple floors.

A castle existed here by 1182, when it was held jointly by noble families including the da Cornazzano, later called Terzi. In 1422 Venetian troops occupied and damaged it, leaving only the keep, which Guido Terzi recovered. From 1440 Giberto, Nicolò and Guido Terzi rebuilt it as a residence after investiture by Filippo Maria Visconti. Troilo II de' Rossi sacked it in 1551.

The hall left of the entrance is decorated with stuccoes and frescoes attributed to Giovanni Bolla, painted in the early 18th century: Flora and Putti, Victory on the Chariot, Allegory and Deity. The Terzi name itself comes from the da Cornazzano family, who changed their surname to Terzi.

The building at Viale della Rocca 6 houses municipal offices, so visits are limited to the exterior and the courtyard. The 27-metre tower is best seen from the front facade, while the eastern entrance is reached by a two-ramp concrete and brick staircase designed by Mario Vacca around 1950. The tower was restored after the 2012 earthquake, with work completed in October 2017.

The large clock on top of the keep replaced a 16th-century iron clock wound by hand, which still works and is displayed in an interior room. The keep also keeps its medieval corbels with machicolations, splayed windows and the central slot that held the drawbridge bolt until the 15th century.