There are not many people alive today who have done this. Most people would never want to.
I'm going to read Edward Gibbon's History of the Decline and Fall of the Roman Empire. All six volumes, cover-to-cover.
I'll give you the "Cliff's Notes," anything I find that's really striking, relevant to bike touring, and especially anything that gives more insight about biking via Appia.
I expect there will be some of these insights, but that's not the real reason I'm reading this. A person I deeply admire has read the entire work and recommended it as a vital key for understanding the economic and political turmoil in the world today.
Usually I bike to get away from politics and the economy, but lately (like for the last seven years!) these twin monsters have kept me from spending more time on the things I love--of which bike touring in Italy and reading about ancient Roman history are always near the top of the list.
So now I get to have my cake and eat it too. Mmm, cake!
I've been given a green light, a good excuse, and a challenge. I get to be a responsible global citizen, promote my personal career and do something fun (while admittedly most people wouldn't call it fun...)
Like I said, if I find any illuminating insight that relates to via Appia I'll post it here. Or if you really want to dig deep and learn about all the unspeakable naughty things that happened in the world of ancient Rome, subscribe here. Or come with me when I do my next via Appia ride.