Last weekend replicas of Venetian cannons were set up at the entrance of hotel Palace Elisabeth, the former Duke's Palace. These cannons date to the end of the 15th and the beginning of the 16th century. The entrance to the hotel has always been through an archaeological site: the former southwestern part of the old city wall (the remains of lower tower). In these walls you can find original round cannon loopholes, where these replicas were places.
These replicas of Venetian cannons in the lower part of tower were chosen according to archaeological findings found there during archaeological excavations in 2018, such as stone cannonballs corresponding to this type of cannon. Also, historical data and analogies from the time of the construction contributed to specifying the appropriate type of cannon.
The name of this type of cannon is Bombard. It was used in the period from the 14th to the 16th century. In its early stages of development, like the replica, it had an explosive chamber (mascolo) that attached to the barrel of the cannon at the rear. This allowed them to fire faster and more efficiently, especially indoors.
You can read more about the history of hotel Palace Elisabeth here.