Way, way back in 79 AD, a baker put a loaf of bread into his oven and then Mount Vesuvius erupted and buried the city. The oven was found and opened in 1930 during excavations and the recipe has been recreated by chef Giorgio Locatelli. He uses buckwheat flour, which was more readily available then, and re-creates the quirks of the bread.
Still looks delicious after all these years!