Sondrio is an Italian town and comune located in the heart of the Valtellina. Sondrio counts approximately 22,000 inhabitants and it is the administrative centre for the Lombard Province of Sondrio.
The area of Sondrio was populated in ancient times by the Ligures and, from the 5th century BC, by the Celts. Formerly an Ancient Roman military camp, today's Sondrio was founded by the Lombards: in their language Sundrium meant "Exclusive property", referring to the status of free men (arimanni) of the holders of the city and the surrounding land.
The heart of Sondrio is its central Garibaldi Square. Not far from it is the Palazzo Sassi, that is home of the Art and History Museum of Valtellina. In a dominant position, near the ancient road to the Valmalenco, linking the town to Switzerland
, there is the Masegra Castle, where it is the Historical Museum of the Grisons Domination.