Came here to say the same thing, it's either Laurel or Oleander leaves that Pythia (the high priestess) either chewed or inhaled (their fumes). At least that's

Came here to say the same thing, it's either Laurel or Oleander leaves that Pythia (the high priestess) either chewed or inhaled (their fumes). At least that's what I remember from high school and what most Greeks know. It's debated that the whole Oracle of Delphi thing could be a very well organized scam, but that's another discussion. It's a place worth the visit: https://www.visitgreece.gr/mainland/central-greece/delphi/ https://www.visitgreece.gr/mainland/central-greece/delphi/