Grosio (Italian pronunciation:[ˈɡrɔːzjo];Lombard:Gros) is acomune (municipality) in theProvince of Sondrio in the Italian region ofLombardy, located about 130 kilometres (81 mi) northeast ofMilan and about 35 kilometres (22 mi) northeast ofSondrio, on the border with Switzerland.
The municipality of Grosio contains thefrazioni (subdivisions, mainly villages and hamlets) Tiolo, Vernuga and Ravoledo.
Rock Engraving Park of Grosio.[3] It houses the Rupe Magna, a large rock which has more than 5.000 engraved figures from the 4th to the 1st millennium BC[4] With a length of 84 m and a width of 35 m, it is one of the largest engraved rocks in the Alpine range. Various themes like human figures, including “orants” or armed men, animals, geometrical shapes and cup-marks are incised on its surface.
Two castle ruins, at the "Dosso dei Castelli" (Castle Hill). The Castello Nuovo was built in the 14th century by the family ofVisconti. The Castello Vecchio (o San Faustino) was constructed in the 11th century by the Bishops of Como.
In the historic center of Grosio is the church ofSan Giorgio (16th century). The single-nave church contains frescoes painted by Cipriano Valorsa, the so-calledRaphael of Valtellina.
Parish church ofSan Giuseppe (17th century)
Villa Visconti-Venosta, the historic summer residence of the family Visconti-Venosta from about 1600 to 1982. When the marchioness Margherita Pallavicino Mossi, widow of Giovanni Visconti-Venosta died, she donated the villa to the comune of Grosio. Nowadays the library of the comune is situated in the basement areas. Since 2017 it is open again as a museum.
