Could this be a possible seiyu joke relating to saitou_chiwa?
I only ask as it looks kinda like Venice/ Neo Venezia in Aria in the background.

The artist says he/she thinks it looks like Florence on the pixiv page. Lucchini is from Romagna(Nothern Italy) so that would explain the background.

Ahh right, many thanks for the clarification on that ^^

Thats pretty obviously the Duomo in the background, so yeah, Florence.

(lol too much AC2 recently)