13th-Century Walls, But Some of the Stones Are Older

Around the bend from the W façade, seen here to your left, the Roman inscription on the N wall gets its own page mostly because I may have been the first to spot it; but don't expect too much: it's a small, worn, unreadable fragment. About all I can say is that it's definitely Roman. Still, if you like puzzles, you're already half an epigrapher; more than half, if you like dull puzzles. [2 pages, 2 photos and some computer enhancements]