This is such a pretty campanile. The San Vidal bell tower is older than the rebuilt church, or at least its foundations are. This tower was damaged by fire in 1105, by earthquake in 1347, restored again in 1680, and then again in 2000.
Over the door is a 15th century relief in tondo of St. Gregory with a dove, a really nice piece of public art.
Here it is, visible from the Grand Canal~