History of Sardinia the speech of the majority of the inhabitants, ultimately developing into the modern Sardinian language, also the Roman religion began to spread among Sardinians. Caralis, the provincial capital, Nora and Sulci obtained the status of Municipium within the 1st century AD and a Roman colony named Turris Libissonis (Porto Torres) was founded in the north-west while the village of Usellus become perphans a Roman colony under Trajan. 4 great roads were built: 2 along the coasts and 2 in the interior connecting all the major cities. During the Roman period, the geographer Ptolemy noted that Sardinia was inhabited by the
Kingdom of Sardinia Sardinia, including the city of Alghero and the semiautonomous Republic of Sassari, and added them to its direct domains. The Giudicato of Arborea, the only Sardinian state that remained independent of foreign domination, proved far more difficult to subdue. Threatened by the Aragonese claims of suzerainty and consolidation of the rest of the island, in 1353 Arborea, under the leadership of Marianus IV, started the conquest of the remaining Sardinian territories, which formed the Kingdom of Sardinia. In 1368 an Arborean offensive succeeded in nearly driving the Aragonese from the island, reducing the "Kingdom of Sardinia and Corsica" to just