A Hidden Early Christian Masterpiece

Right beside Sant'Agnese fuori le Mura / St Agnes outside the Walls, on Via Nomentana, sits one of Rome's least-known treasures: the Mausoleum of Santa Costanza (Mausoleum of Constantina). Built in the 4th century as a tomb for Costantina (known as Costanza), daughter of the emperor Constantine, it is one of the best-preserved early Christian buildings in the world, famous for its extraordinary mosaics. Few places tell the story of art's shift from Roman to Christian so vividly.

The Circular Architecture

The mausoleum has a circular plan, with a central ring crowned by a dome and ringed by an ambulatory (an annular corridor) covered by a vault. The paired columns, the sweeping curves and the light streaming down from above create a harmonious, solemn space, a perfect example of late antique architecture. The structure inspired centrally planned buildings for centuries to come.

Want to admire the mosaics of Santa Costanza with a private driver?

My Rome Driver takes you out to Via Nomentana and waits while you explore, then on to your next stop. Flat rate, door to door.

Check availability and request a quote

Reply within 30 minutes · Flat rate · Free cancellation up to 24h before

The Grape-Harvest Mosaics

The true masterpiece is the mosaic vault of the ambulatory, among the oldest surviving Christian mosaics anywhere. Across a pale background wind vine tendrils, putti gathering grapes and scenes of the grape harvest, alongside birds, flowers and geometric patterns. These are images of joyful abundance that, though drawn from the "pagan" Roman repertoire, take on a distinctly Christian meaning here (the vine as a symbol of Christ and the Eucharist). It is precisely this fusion of old and new that makes the mosaics so precious.

Between Roman and Christian Art

Santa Costanza is the ideal place to grasp how Christian art was born inside Roman art: the same subjects, the same techniques, the same colors, reinterpreted with a new message of faith. The grape-harvest mosaics, in particular, form a perfect bridge between the classical world and the Christian one.

What to Look For

  • The vault mosaics, with vine tendrils, putti and the grape harvest.
  • The circular architecture, with its dome and ambulatory.
  • The pairs of ancient columns.
  • The sarcophagus of Costantina (the original is in the Vatican Museums; a copy stands on site).

Frequently Asked Questions

What is the Mausoleum of Santa Costanza? A circular 4th-century building on Via Nomentana, built as a tomb for Costantina, daughter of Constantine: one of the best-preserved early Christian buildings in the world.

Why do the mosaics matter? Because they are among the oldest Christian mosaics: the harvest scenes, vine tendrils and putti merge the Roman repertoire with a new Christian meaning.

What do the grape-harvest mosaics represent? Vine tendrils, putti gathering grapes and scenes of the harvest: symbols of abundance that, read in a Christian key, point to Christ and the Eucharist.

Where is Costantina's sarcophagus? The original, carved in porphyry, is kept in the Vatican Museums; a copy stands in the mausoleum.

Can you visit it together with Sant'Agnese? Yes: the mausoleum is just steps from the basilica of Sant'Agnese fuori le Mura / St Agnes outside the Walls and is visited as part of the complex.

Read Also

Book a driver for Santa Costanza

Flat rate · ZTL access · Door to door

Article #516 · Category: Monuments · Updated: May 2026