The immense mud ramparts still stand.
Only its massive outer walls, towers and ramparts are left.
In 1865 the last vestiges of its ramparts were removed, and since that date,.
Several old houses, some remains of the medieval ramparts and the Tour de l'Horloge, an ancient gateway, are also preserved.
The cities, exposed to pillage by Huns in the north and Saracens in the south, and ravaged on the coast by Norse pirates, asserted their right to enclose themselves with walls, and taught their burghers the use of arms. Within the circuit of their ramparts, the bishops already began to exercise authority in rivalry with the counts, to whom, since the days of Theodoric, had been entrusted the government of the Italian burghs.