This place is in Umbria, right?
The town is not Assisi, and I don't think the correct town is in Assisi. Asking me about Italian regions, though, could be an adventure. I'll do my best.
Not Assini though.
Here's a map...http://goeurope.about.com/cs/italy/l/bl_italy_region.htm
Not Verona.
Here's an aerial view of the town ....
I'll give it to you Francis, because you're so close. It is Lucca.
I think the name of the place is "Piazza dell'Anfiteatro," but let's call it good.
http://www.virtualtourist.com/travel/Europe/Italy/Tuscany/Lucca-149133/Things_To_Do-Lucca-Piazza_dellAnfiteatro-BR-1.html#0
Seems that some sites describe wrong places : see here
Giglio
But I think Tico is right, it's Piazza dell'anfiteatro.
We are now looking for this place :
