These were all taken in the church San Fantin, which is right in front of La Fenice, in the sestiere of San Marco. It is not normally open to the public, but for some lucky reason, it remained open for several weeks, after it had been used as a Biennale site. Like so many other churches in Venice, it is sadly in need of restoration. The lighting was dim, so I do apologise for the same dim quality of the photos!
In his wonderful website Churches of Venice, Jeff Cotton describes this crucifix: “Also, a 15th-century Tuscan polychrome wood crucifix the restoration of which was paid for by Venice in Peril in 2002. This crucifix was the one that was carried in front of condemned prisoners from the dungeons to the place of execution between the two columns on the Piazzetta.” Please see : sanfan
There was another baptismal font, much less ancient in appearance.
If you are interested in churches, I hope you have the good fortune to find San Fantin open when you are in Venice.