Bread (semi)-preserved by the eruption of Mount Vesuvius, Italy, 79 AD
https://diningandcooking.com/687253/ancient-loaves-of-bread-from-the-cities-of-pompeii-and-herculaneum-that-were-carbonized-in-volcanic-pyroclastic-flows-of-mount-vesuvius-in-79-ad/
Pretty sure they aren't edible, but they provide a glimpse into how Roman bread looked!