I suppose there are two that fit this criteria. The first was a piece of Roman amphora from 20 metres down in the Mediterranean. It was from a second century wreck. I may have been the next person to touch it in the 1800 years since it was lost.

The second thing was another piece of pottery this time Samian from the Roman period. This one is cooler than the first as I know the person who touched it before me was from the first to second century AD. How do I know this. Well a little rabbit had made a burrow and kindly kicked it out just before I came along.

Luckily for me both were outside of any protected area so they were both classed as waste.

If I knew where they were I would add a photograph of them.