It comes from the age when wasting a single piece of bread, even if it was stale, was a kind of blasphemy. In the 12th century, Pisa's rulers disagreed with Florence’s rulers and cut their supply lines from the coast. This made salt banned. The Florentines, unwilling to give in to the pressure, simply started baking their bread without salt. This is how Pana Toscano was born, Tuscan bread that was later added to tomato soup. This dish was widely popularized by the 1911 publication of Il Giornalino di Gian Burrasca and its television version, in which Rita Pavone sang the well-known song Viva la pappa col pomodoro.