My husband and I stayed at the Royal San Marco hotel, right next door to San Marco Square. The bells in the tower ring out during the day and also @ midnight. Be warned that because Venice is an island and canals through every which way that there aren't any vehicles here except the water taxis and water buses. .
"Pigeons of San Marco"
Also in the square it self is where the pigeons are, in swarms. There are vendors there that sell bird seed to feed them. Once you get the bird seed the pigeons home in on you. Another word to the wise, wear an old shirt because the flying rats have very dirty feet, think bird doo.
Walking though Vencie is great. You go down one alley and turn down this alley and then over one of many canals. There is tons of shopping to be done here, especially when it comes to glass figurines and Carnival Masks. There is this one brige that I named "The bridge of shops" that is covered with stores selling jewlery, leather goods, masks and souvienirs. It was a bit misty and gloomy but I think it added to the charm of Venice. The last day when we were leaving there was some puddles of water and the water was coming up, the begining of Venice starting to do it's known flooding. My theory on this is that it was high tide due to a full moon or one coming. To me that just sounds like more charm.