Grosio

Grosio is a municipality located in the Province of Sondrio within the Lombardy region of Italy, situated approximately 130 kilometers northeast of Milan near the Swiss border. Perched at an elevation of 656 meters, this alpine community encompasses several hamlets, including Tiolo and Ravoledo. While the town itself features historic religious structures like the sixteenth-century Church of San Giorgio, which houses frescoes by the renowned local artist Cipriano Valorsa, its primary claim to fame lies in its remarkable archaeological and medieval heritage found on the surrounding hills.

The area is historically significant for the Dosso dei Castelli, or Castle Hill, which hosts two distinct castle ruins representing different eras of architectural style and power. The older structure, Castello Vecchio, was constructed in the eleventh century by the Bishops of Como, while the Castello Nuovo dates to the fourteenth century and was built by the influential Visconti family of Milan. These fortifications overlook the Rock Engraving Park of Grosio, home to the Rupe Magna. This massive rock slab, measuring 84 meters in length, contains over 5,000 petroglyphs carved between the fourth and first millennia BC, making it one of the largest engraved rocks in the entire Alpine range.

Today, Grosio preserves these sites as major cultural attractions. The castle ruins stand as testaments to the region's feudal past, while the prehistoric engravings offer a unique window into ancient Alpine life. Additionally, the town maintains the Villa Visconti-Venosta, a historic summer residence used by the noble family from roughly 1600 until 1982. Following a donation to the municipality, the villa has been repurposed and reopened as a museum in 2017, with its basement areas now serving as the communal library, ensuring the continued cultural vitality of this historic Italian town.