Cly Castle

Cly Castle stands as a remarkable example of early medieval fortification in the region of Campania, Italy. Perched strategically on a hilltop in the municipality of Saint-Denis, it overlooks the Dora Baltea river and commands panoramic views of the surrounding countryside. The castle's origins trace back to the early 11th century, making it a significant relic of high medieval architecture and feudal history in the Italian Alps.

The castle is classified as a hill castle, built in the so-called "primitive" style characterized by a central keep or mastio surrounded by a defensive curtain wall. Its construction is dated to around 1027 based on dendrochronological analysis of timber remains, although the first documentary mention appears in 1207. This early date situates Cly Castle among the oldest fortifications in the region, reflecting the strategic importance of controlling Alpine passes and trade routes during the medieval period.

Historical context and ownership

The site of Cly Castle reveals evidence of human occupation that predates its medieval construction, with archaeological findings indicating prehistoric and protohistoric activity. The castle's earliest wooden structures, particularly within the central keep, have been scientifically dated to the early 11th century, underscoring its role as a fortified manor established by local nobility during the early Middle Ages.

Originally a fief under the suzerainty of the Counts of Savoy, the castle was granted to the Cly branch of the Challant family in the 13th century. Notably, Boson IV, son of Viscount Boson III of Aosta, significantly fortified and expanded the manor, shaping it into a complex that controlled a vast territory including present-day Chambave, Saint-Denis, Diémoz, Verrayes, Torgnon, and the Valtournenche valley. This expansion highlights the castle's strategic role in regional governance and defense.

Following Boson IV, the lordship passed through his descendants, including Boniface I and his son Peter, whose oppressive rule led to conflict with Count Amadeus IV of Savoy. As a result, Peter's titles and properties, including Cly Castle, were confiscated. From 1376, the castle came under direct control of the House of Savoy, serving as an administrative center and justice seat for approximately two centuries.

Notable events and later history

One of the castle's most somber historical episodes occurred in 1428 when Johanneta Cauda was imprisoned in its dungeons. She is historically significant as the first woman in the Western Alps accused of witchcraft. After a 71-day confinement, she was executed by burning near the castle grounds, marking a dark chapter in the castle's history.

Ownership of the castle later passed through several noble families, including the San Martino, de Candia, Visdomini di Ginevra, Birago San Martino de Candia, and finally the Roncas family in 1634. By the late 17th century, the castle was abandoned, and much of its stone was repurposed to construct a more comfortable manor in Chambave. The castle subsequently fell into ruin until the early 20th century when historian Tancredi Tibaldi acquired the property on behalf of the Saint-Denis municipality, preserving its remains.

Architectural features and layout

Cly Castle exemplifies the primitive castle style typical of the Aosta Valley, dominated by a massive central keep rising approximately 18 meters above its rocky foundation. The keep's base measures roughly 9.4 by 9 meters and is internally divided into three floors. Its elevated entrance, originally accessed by a wooden ladder, provided defensive advantages against attackers. This entrance was later modified with a stone staircase supported by a now-collapsed flying buttress. Over time, several doors and windows were bricked up to enhance the keep's defensibility.

Surrounding the keep is a nearly intact crenellated curtain wall enclosing about 2800 square meters. The western section of the wall was intentionally left free of buildings to serve as a refuge area for the local population during attacks. On the southeastern side, archaeological excavations have revealed the foundations of several buildings dating from the 11th to 14th centuries. These included kitchens, stables, a guardhouse, and the lord's residence, alongside the Romanesque chapel of Saint Maurice.

The chapel of saint maurice

The chapel, attached directly to the keep, likely dates back to the 11th century. Its east-facing apse once featured frescoes depicting angels, saints, and evangelists. Although only fragments remain today, these frescoes were documented by early 20th-century scholars through drawings and descriptions, offering valuable insights into the castle's religious and artistic heritage.

Water supply and defensive structures

In the northwest corner of the castle enclosure lie the remains of a tower beneath which is a subterranean cistern lined with cocciopesto, a waterproof mortar used since antiquity. This cistern was part of an advanced water supply system, supplemented by a wooden pipeline that channeled water from a hillside spring. Such infrastructure highlights the castle's self-sufficiency and the importance of water management in medieval fortifications.

The southern portion of the castle, once home to residential buildings and guardhouses, now exists largely in ruins, with only faint traces discernible. Despite this, the preserved curtain wall and central keep continue to convey the castle's original medieval layout and defensive design.

Cultural significance and visitor information

Today, Cly Castle is a cherished cultural landmark within the Aosta Valley, symbolizing the region's medieval heritage and feudal past. Its ruins offer visitors a tangible connection to the early medieval period and the complex history of noble families, regional power struggles, and architectural evolution.

The castle is owned by the municipality of Saint-Denis and is open to the public through guided tours during the summer months of July and August. Visitors can explore the castle's ruins, appreciate its commanding views, and learn about its historical significance through interpretive materials and expert guides.

Its location atop a hill overlooking the town of Chambave makes it accessible to visitors interested in medieval architecture, history, and Alpine culture. The site also attracts scholars and enthusiasts of medieval fortifications due to its well-preserved primitive style and archaeological importance.