The crest of the Visconti of Gallura (Pisa and Sardinia) - Credit: Fabiocarboni
There were two Visconti
dynasties who were prominent in Italy in the Middle Ages. This probably refers to the Visconti family of Pisa
who also had a family branch in Sardinia
. The patrician of the Pisan Visconti clan was Alberto; his grandchildren Lamberto and Ubaldo I brought the dynasty to its height in the late 12th
century. Both of them held control over Pisa until around 1213 when power was divided between four families and the power of the Viscontis diminished greatly.