Last year, about three weeks before I was due to leave for Venice, I read on Slowtalk a post about a legend dating back to the 14th century about how an old woman aided in thwarting a rebellion against the doge, Pietro Gradenigo.
Here's the story, from
The Rough Guide to Venice & the Veneto.
I had a bit of trouble finding the exact location of the commemorative plaque. I knew it was on a calle, just off Piazza San Marco. After walking for a few minutes looking up, searching for la vecchia I finally found her above a sotoportego, just around the corner from the Torre dell'Orologio.