A characteristic element of the new fortified enclosure was the bastions that
were 7 in all, from east to west: the bastion of Sabbionara (of the sand),
of Vitturi, of Jesus, of Martinego, of Bethleem, of Pantocratoras and of St.
Andreas. The bastions were joined together with straight lines (parts) and
in the place of their joining there were formed two «low squares», lower than
the level of the bastion and higher than the ditch. In these open areas there
were built special places for the canons that defended the ditch underneath
and the opposite bastion. In these "low squares" there existed two openings
with galleries (long corridors), one of which was leading into the city and
the other in the ditch.