Visconti of Pisa and Sardinia Ubaldo. In 1207, Lamberto married Elena, the heiress of Barisone II of Gallura, thus securing control over the northeastern corner of Sardinia with his capital at Civita. In 1215, he and Ubaldo established their hegemony over the Giudicato of Cagliari in the south of the island as well. Through advantageous marriages, Lamberto's son, Ubaldo II, secured power in Logudoro for a time. By mid century, Pisan authority was unopposed in Sardinia, thanks to intermarriages between the Visconti family and the other great families of Pisa (Gherardeschi and Capraia) and Sardinia (Lacon and Bas-Serra). Visconti of Pisa and Sardinia The Visconti
Sardinia Toro and Isola La Presa) and 8° 8' and 9° 50' east longitude (respectively Capo dell'Argentiera and Capo Comino). To the west of Sardinia is the Sea of Sardinia, a unit of the Mediterranean Sea; to Sardinia's east is the Tyrrhenian Sea, which is also an element of the Mediterranean Sea. The nearest land masses are (clockwise from north) the island of Corsica, the Italian Peninsula, Sicily, Tunisia, the Balearic Islands, and Provence. The Tyrrhenian Sea portion of the Mediterranean Sea is directly to the east of Sardinia between the Sardinian east coast and the west coast of the Italian