A Dutch tourist has defaced a frescoed wall in an ancient Roman house in Herculaneum, near Naples, damaging a building that survived the volcanic eruption of Mount Vesuvius in 79 AD, Italian police said on Monday.

The police statement said the 27-year-old tourist was swiftly identified after staff at the archaeological site discovered tagged graffiti writing made with a black, indelible marker pen on a white section of a painted wall.

Police said the writing was the man’s graffiti signature.