In the 13th century, this bridge was the scene of one of the heinous crimes of Ezzelino III da Romano, a tyrant who was opposed by the da Carrara family, the local lords who would dominate Padua in the following century. Ezzelino had Giacomo da Carrara exiled in 1237 after the latter had the impudence to dare slap him in front of the emperor. This act was immediately answered by Jacopo da Carrara, another member of the family, who started to gather an army at the castle of Agna with the idea of returning to the city. Ezzelino's response was immediate and cruel. He laid siege to Agna and had Jacopo brought in chains to Padua. To prevent the population from rising up, however, he ordered his beheading on the bridge of San Giovanni delle Navi.