For those interested in the Mephisto sandals I purchased in Venice, they're available online here.
The ECCO Mary Janes that worked so well and carried me through days and evenings are those above. (On sale, too!)
While both are, admittedly, on the Sturdy Gal side of the style spectrum (perhaps with a nod toward Artsy Cousin?), both are exceptionally comfortable and supportive, perfect for those days that include hours of wandering through art museums, Roman ruins, wineries, cathedrals or just in circles trying to find Harry's Bar.