Hi Phoebe!
Here's are two close-up photos of the plaque:
https://commons.wikimedia.org/wiki/File:PlacaWikimania2016.jpg
https://commons.wikimedia.org/wiki/File:Wikimania2016_by_Rainer_Halama-3297.jpg
Here thay say it was made but Enrico Nasazzi, a sculptor from Esino Lario:
Hi Phoebe,
the plaque was revealed during the closing ceremony. I understood it is
connected to the collaborative space (how typical) of the village, to
commemorate that Wikimania was in the town. I'm not sure if the space is
actually named after Wikimania, that part of the translation got lost