If you find it hard to believe, it helps to know there are many varieties of pizza in Italy that do not include tomato sauce (pizza bianca). For example, quatro formaggi is often without sauce. But the plainer pizze bianche are actually similar to focaccia, which is a cousin of the world famous pizza, and indisputably bread.

So at what point along the focaccia - pizza continuum does the dish become un-bread? At the addition of tomato sauce? Then how come is quatro formaggi so often served in pizzerias? At the addition of cheese? Marinara, one of the most classical of all pizzas, is defined by its lack of milk-based ingredients (which do not preserve at sea, hence the name.)

Clearly, pizza, too, is bread.