The war between Como and Milan
Between 1118 and 1127 the cities of Como and Milan were at war. Tremona, along with other locations in the Sottoceneri region, probably came under attack: hundreds of arrowheads have been found and this, combined with the lack of any coins that can be dated to between the end of the eleventh century and the twelfth century, suggests that there was a siege or a retreat or that the settlement was destroyed. But Tremona rose once again. Just a few decades later, in the second half of the twelfth century, the castrum had been rebuilt and repopulated. A new city wall was built closer in than the original; the entrance to the village was moved to the central part of the western area, and new buildings were constructed.