Along with military force meanwhile, was being consolidated mercantile vocation, which would bring Pisa to establish itself as one of the great powers of the Mediterranean formed a free commune, Mille said after his dominion over Sardinia, Corsica and the Balearics; the wake of the Crusades was able to extend its commercial influence to Syria.

The golden period is from the twelfth century to the first half of XIII: the time frame in which Pisa into history as a glorious maritime republic, is enriched with beautiful monuments and witnessed the birth of the Studium University, one of the oldest and most prestigious of ‘Europe.