<P> The Giudicato of Cagliari (or Pluminos), during the regency of Torchitorio V of Cagliari and his successor, William III, was allied with the Republic of Genoa . For this it was brought to an end in 1258, when its capital, Santa Igia, was stormed and destroyed by an alliance of Sardinian and Pisan forces . The territory then was divided between Republic of Pisa, the Della Gherardesca family and the Giudicati of Arborea and Gallura . Pisa maintained the control over the fortress of Castel di Cagliari founded by Pisan merchants in 1216 / 1217 east of Santa Igia; in the south - west the count Ugolino della Gherardesca promoted the birth of the town of Villa di Chiesa (today Iglesias) to exploit the nearby rich silver deposits . </P> <P> The Giudicato of Logudoro (sometimes called Torres) was also allied to the Republic of Genoa and came to an end in 1259 after the death of the judikessa (queen) Adelasia . The territory was divided up between the Doria and Malaspina families of Genoa and the Bas - Serra family of Arborea, while the city of Sassari became a small republic, like the Italian city - states (comuni), confederated firstly with Pisa and then with Genoa . </P> <P> The Giudicato of Gallura ended in the year 1288, when the last giudice, Nino Visconti (a friend of Dante Alighieri), was driven out by the Pisans, who occupied the territory . </P> <P> The Giudicato of Arborea, having Oristano as its capital, had a longer life compared to the other kingdoms . Its later history is entwined with the attempt to unify the island into a single Sardinian state (Republica Sardisca) against their relatives and former Aragonese allies . </P>

What island is north of the island of sardinia and west of rome italy