Years ago, when there was still a cottage industry producing charcoal the old-fashioned way (by hand, generally a father-to-son kind of thing), one guy finally got curious about the stone floor of his pit, started digging around a bit, and discovered he’d been using the surface of a Roman road that had been covered by soil to a depth of a foot, foot and a half.
I was watching some cable show where some Brit archeologists were looking for some Tudor-era palace, and they were miffed when they kept finding Roman artifacts. I’d much rather find Roman stuff than some Henry VIII chicken bones.