A Dominican, Leandro Alberti (Descrizione d'Italia, 1550), states that they were originally nine in number, and an independent authority, Antonio Concioli (Statuta civitatis Eugubii, 1673), states that two of the nine were taken to Venice in 1540 and never reappeared.
Alberti in C. Bursian's Biographisches Jahrbuch fur Altertumskunde, xx.
The early margraves had permitted the Florentines to wage war against the Alberti family, whose castles they destroyed.
By 1176 the Florentines were masters of all the territory comprised in the dioceses of Florence and Fiesole; but civil commotion within nobles, headed by the Alberti and strengthened by the many feudal families who had been forced to leave their castles and dwell in the city (1177-1180).
In the end the Alberti, though not victorious, succeeded in getting occasionally admitted to the consulship. Florence now formed a league with the chief cities of Tuscany, made peace with the Guidi, and humbled the Alberti whose castle of Semifonte was destroyed (1202).