The website header images are based on a photo from Bologna by Szs, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=1164299
The image of Piazza Maggiore, Bologna, on the Venue page is by Tango7174, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=7200031