Last year, I wrote about how I like to look for fossils in church floors when I'm in Venice. This past December, I found this very unique double fossil in the floor of the church of Santa Maria Formosa! Kinda reminds me of a mother and child.
Speaking of church floors, here's a scan of a postcard that shows a few details from the floor of Basilica di San Marco. I've seen aerial photos of the Basilica's floors and they are so amazing, but unfortunately much of that floor is covered with protective mats. I'd love to see more of it.