Sadly, it’s not pizza, it’s focaccia, but I keep seeing headlines calling it pizza anyway because of a new fresco found in Pompeii.
https://www.nytimes.com/2023/06/27/world/europe/pizza-mural-pompeii.html
Still, this makes a good time to check out the history of flatbread and moretum:
https://la.wikipedia.org/wiki/Moretum
Ovid, Virgil, Apicius and others talked about moretum and putting a mix of various spices, cheese, olive oil, herbs, etc on bread, and the versions of moretum with pine nuts and basil could have led to modern day pesto sauce.
Max Miller of Tasting History on YouTube made this, and I tried too because I never miss an opportunity to eat bread and cheese. Link: https://www.youtube.com/watch?v=eEgSGkp8nMA
He talks about Virgil here but I couldn’t find the Latin yet myself, apparently it’s in his early poems, a recipe in poem form for moretum, and then in the Aeneid there is talk of eating tables, and apparently “mensa” also referred to “bread plate,” i.e. flatbread but I am still digging through original sources for this and Apicius.
But in the end, all of this could lead to modern day pizza, at least, once tomatoes were introduced to Italy.