Bocca della Verità · Santa Maria in Cosmedin
The marble face that bites liars
Long before Audrey Hepburn made it famous in Roman Holiday, this ancient marble mask was used as a lie detector. The legend holds that anyone who places their hand in its mouth and tells a lie will have it bitten off. Medieval priests reportedly hid a scorpion behind it to make the threat more convincing. Originally, it wasn't even art — it was a Roman drain cover.