Advanced imaging technology has revealed 79 new pieces of graffiti on a wall in Pompeii’s theater district. Until now, these inscriptions had been too faint for the human eye to see.

https://www.smithsonianmag.com/smart-news/archaeologists-say-theyve-identified-traces-of-a-2000-year-old-love-note-still-etched-into-a-wall-in-ancient-pompeii-180988163/Open link