Princi, Milan, Italy Of course, the dramatic dawn of the designer bakery took place in Milan. Princi, also designed by Claudio Silvestrin, offers organic breads and other goodies made according to traditional recipes. And it is open 24 hours a day and even on Sundays. Owner Rocco Princi opened his first bakery in 1986. He now has four stores in Milan and one in Soho, in London.