In the ruins of Herculaneum, a Roman town destroyed by the eruption of Mount Vesuvius in 79 AD, a carbonized loaf of bread was found. The British Museum had chef Giorgio Locatelli recreate the recipe as best he could.
Things start to get really interesting around 3:25, where Locatelli tries to recreate the unusual markings found on the bread...that hanging string around the edge is a little genius.