She swore an oath not to diminish the territory of the giudicato, nor to alienate its castles, nor to make foreign alliances without their consent.
Benedetta favoured natives over Pisans for positions in her government and preferred to cultivate the economy of Sardinia than that of the Republic of Pisa.
In that year, Lambert Visconti, then judge of Gallura, landed a large army near Cagliari and took the dominating hilltop of S. Gilla, fortifying it.
In June 1216, she made a donation to the cathedral of Pisa in hopes of procuring their support, but in 1217, Lambert's brother, Ubald I Visconti, forced her to accept terms surrendering Cagliari.
In his place he sent Ugolino dei Conti, Cardinal Bishop of Ostia and Apostolic Legate to Corsica and Sardinia.
[3] She agreed to pay an annual tribute of twenty pounds of silver to the Holy See and not to contract any other marriage without papal approval and blessing.
By February 1233, Pope Gregory IX had given Massa and Potenzolo to Ugo di Procaria, while Cagliari was divided between the Visconti, Capraia, and Donoratico, Pisan families.