Another shrine on a bridge that seems to be located specifically for gondoliers and boatmen...right at their eye level and just above the water!
The beautiful carving of Mary, Queen of Heaven, is dated 1615. The bridge is Ponte Cavallo (horse), named in honor of the famous equestrian statue in the adjacent campo of Ss. Giovanni e Paolo (aka San Zanipolo). There might be gondolas carved at the bottom of this shrine too but it's kind of hard to tell. I think I see them though in the third photo down.
I love the stars above her shoulder. Many shrines have flowers, but this one has a live volunteer weed growing out of the stones! A remarkably green and healthy looking plant too. It's great to see plants growing in improbable places like this...makes me believe that nature will prevail no matter what.