I'm with John on this - definitely a sleepy town. We visited in July 2015 on a whim after seeing it on roadsigns whilst killing time before our flight from Trieste to Bari. There was some debate in our car as to what Palmanova was (I was ignorant of its TWHS status): a fortified town or a shopping mall! We drove in to the centre and strolled about the piazza, stopping for coffee. It was blazing hot and there seemed hardly a sole out and about. The walls are impressive. I wish I'd attempted the perimeter walk, but I think if I had I would have passed out from sunstroke!