The Lamberti Tower dates back to the 12th century and the presence of several bells earned it the name 'Turris a Campaneis' (Tower of Bells). It rises in Piazza delle Erbe, towards the corner of the Costa, and its construction is said to date back to 1172.

A certain mystery has always hovered around the Lamberti family, who built the tower. In the Romanesque period, the tower stood at a modest height, as indicated by its construction in tuff and cotto tile. Two bells were placed on it by the resolution of 28 November 1295: a small one - which was to be used in case of fires - and a larger one that (mainly) served to gather the city council and to call the citizens to arms in defence of the town. 

Cast several times, the two bells still retain their old names, Marangona and Rengo. In 1403, a lightning struck the top of the tower. After some time, it was decided to restore it and raise it. On the tower there are the coats of arms of Podestà Francesco Bon and Capt. Giovanni Malipiero.