Stuffed breads were already familiar.
Italian and Italian-American cooks had long made breads filled with cheese, cured meat, greens, and leftovers. Stromboli uses that habit in a pizza-shop form.
Origins and identity
Stromboli is Italian-American, not ancient Italian.
The dish belongs to the mid-century American pizzeria tradition: Italian bakery logic, pizza-shop ingredients, and a practical format made for slicing, sharing, and reheating.
The modern name takes hold.
The dish is commonly associated with the Philadelphia-area pizzeria world, with Romano's in Essington, Pennsylvania often credited for popularizing the name. Other local origin stories exist, which is typical for regional foods that spread through restaurants.
Regional versions coexist.
Some shops make compact personal rolls; others bake long party loaves. Fillings can be classic deli meats, chicken cheesesteak, vegetables, or breakfast ingredients, but the rolled structure remains the signal.
Why the movie-like name?
The name is linked to Stromboli, the volcanic island and the 1950 film. It gave a dramatic label to a hot, rolled, eruptive-looking pizzeria item.
Is it pizza?
It uses pizza dough and pizza-shop fillings, but it eats more like stuffed bread: handheld, sliced, and sauce-dipped.
Is it a sandwich?
It can function like one, but most menus place it with pizza, calzones, and baked rolls rather than cold sandwiches.