Almost directly above the olive-stoner outside the Archaeological Museum is a huge stone incorporated into the entrance archway through the citadel walls. It's got a Roman inscription (translation on its notice) and is actually covered with a sheet of Perspex to protect it. which is a good thing; Roman inscriptions are as rare as hen's teeth in England, so it's pleasing to see them valued where they are (probably) more common.
....supposedly. I think it's probably an olive-press, myself, but the notice above it said otherwise. It's Roman, and tucked into a corner by the Archaeological Museum in the citadel. Nice to see evidence of the Roman era, although very easy to just pass it by.