Rome's most famous marble face

The Mouth of Truth / Bocca della Verità is one of Rome's most beloved and most photographed sights: a huge marble mask carved with a face (possibly a river deity), kept in the portico of the church of Santa Maria in Cosmedin, in the Forum Boarium. Legend says that anyone who places their hand inside its mouth while telling a lie will have it bitten off. Made world-famous by the film Vacanze Romane (Roman Holiday), it draws lines of visitors every single day for that classic photo, hand inside the mouth.

The legend and its origins

The Mouth of Truth was most likely a large Roman drain cover (a manhole lid) or a fountain, carved with the face of a deity (often identified as a river god or Oceanus). In the Middle Ages it became the subject of legend and popular "judgment": the marble face as a lie detector. The pull of that story, far more than the real history, is what turned it into a symbol of Rome.

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Santa Maria in Cosmedin

The Mouth of Truth sits in the portico of Santa Maria in Cosmedin, one of the loveliest medieval churches in Rome. It is well worth stepping inside to admire:

  • The exquisite Cosmatesque floor.
  • The elegant Romanesque bell tower, among the tallest in Rome.
  • The choir, the ambo and the medieval furnishings.
  • The crypt beneath the altar.

Admission to the church is usually free, while a small donation is expected for the photo at the Mouth of Truth in the portico.

How to visit and opening hours

You can see the Mouth of Truth in the portico for a small donation and, especially in high season, there may be a line (hours and amounts are indicative — check on site). To skip the wait, go early in the morning. To reach the area, see how to get to the Forum Boarium.

Tips for your visit

  • Go early: in the morning the line for the photo is shorter.
  • Step inside the church: Santa Maria in Cosmedin is a medieval gem too often overlooked.
  • Pair it with the temples: Hercules Victor and Portunus are just steps away.
  • Respect the place: it is an active church — behave accordingly.

Frequently asked questions

What is the Mouth of Truth? A large Roman marble mask kept in the portico of Santa Maria in Cosmedin: according to legend, it bites the hand of anyone who tells a lie. It is one of the icons of Rome.

Why is it famous? For the "lie detector" legend and for the film Vacanze Romane (Roman Holiday), which made it famous around the world.

What did it originally represent? Most likely a large Roman drain cover or a fountain bearing the face of a deity (possibly a river god or Oceanus), which later became the subject of legend in the Middle Ages.

How much does it cost to see it? A small donation is usually expected for the photo in the portico; admission to the church is generally free. Amounts are indicative — check on site.

How do I avoid the line? Go early in the morning, especially in high season, when the queue for the photo can get long.

See also

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Article #532 · Category: Monuments · Updated: May 2026