I expected Modena on a Sunday afternoon to be a bit quieter than it was. These shots were taken with quite a few people passing through the scene. At 30 seconds, as long as nobody stopped to take a selfie, or let their dog piss on the railings ( yes it happened) the crowds were magicked away.
Worked much better than I expected. Very long exposures over 30 seconds, seem to be a really useful tool for dealing with crowded places. You can see some "ghosts" in the background, in the first shot.
The Bell tower and the apse lean badly, but it has been OK for a thousand years, so I quess everything is OK.