Castelsardo

Castelsardo (; ) is a town and "comune" in Sardinia, Italy, located in the northwest of the island within the Province of Sassari, at the east end of the Gulf of Asinara.
History.
Archaeological excavations have showed the human presence in the area of Castelsardo since pre-Nuragic and Nuragic times, as well as during the Roman domination in Sardinia.
After the fall of the Western Roman Empire, the monastery of Nostra Signora di Tergu was founded nearby, but the current town originates from the castle built here, in 1102 (or 1270), by the Doria family of Genoa. The castle and the village which gradually formed round it where the seat of the Doria's fiefdom in the island called "Castel Doria" or "Castelgenovese", until it was conquered by the Aragonese in the 15th century (1448), and named "Castillo Aragonés" ("Castel Aragonese"). Except for the Maddalena archipelago, it was the last city in the island to join the Kingdom of Sardinia.
Castelsardo, was part of the Savoy's Kingdom of Sardinia, obtained by will of King Charles Emmanuel III.