This is Sant’Antonio Taumaturgo or, as it’s also called, Sant’Antonio Nuovo, the church that you saw in the background of yesterday’s image.
The church and the square in front of it are at the end of a short, straight canal coming at a right angle from the sea, not much longer than 150 meters. Along the canal are some typical tourist restaurants and cafés, nothing really recommendable, but sitting next to the water is nevertheless quite satisfying.