Anything related to nanotechnology feels fairly modern, doesn’t it? Although Richard Feynman planted the seeds of the idea in 1959, the word itself didn’t really get formed until the 70s or 80s, depending on who you ask. But there is evidence that nanotechnology could have existed as far back as the 4th century in ancient Rome.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/01/26/nanotechnology-in-ancient-rome-there-is-evidence/