A place between myth and archaeology

In the heart of Caffarella Park, wrapped in greenery, stands the Nymphaeum of Egeria: a Roman structure tied to one of the most captivating legends from Rome's origins. Once a spring sacred to the waters, today it is an evocative corner of ruins where history and myth intertwine, one of the favorite stops for anyone exploring the valley.

The legend of Egeria and Numa Pompilius

According to tradition, the nymph Egeria was a water deity who met King Numa Pompilius, the second king of Rome, by night to inspire his laws and sacred rites. Their meetings are said to have taken place in a wood sacred to the gods at the city's edge, beside a spring. For centuries this site was identified with the nymphaeum in the Caffarella, which took the name "Nymphaeum of Egeria," steeped in mythological allure.

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The nymphaeum and the villa of Herodes Atticus

Beyond the legend, the monument was in fact a nymphaeum (a monumental fountain) belonging to the grand villa of Herodes Atticus, a wealthy and cultured Greek figure of the 2nd century AD who owned vast tracts of land in the valley. The brickwork structure still preserves the central niche where a statue once stood (perhaps of the river god Almone) and the remains of the decorative facing.

What you see today

Today the Nymphaeum of Egeria appears as a vaulted hall with niches, facing a small pool of water and ringed by greenery. It is a romantic, shaded spot, perfect for a pause during your walk. It sits along the valley's trails, near the other monuments such as the church of Sant'Urbano.

Egeria in the imagination

The figure of Egeria has inspired poets, travelers, and artists for centuries, especially during the Grand Tour: the nymphaeum was a romantic stop for those seeking the Rome of myth and nature. Even now it keeps that charm, made of water, ruins, and legend. For the wider context of the valley, see the complete guide to Caffarella Park.

Frequently asked questions

Who was Egeria? A water nymph who, according to legend, inspired King Numa Pompilius with laws and sacred rites during nighttime meetings beside a spring.

What is the Nymphaeum of Egeria really? A Roman nymphaeum, that is, a monumental fountain, belonging to the villa of Herodes Atticus in the 2nd century AD, later identified with the site of Egeria's legend.

Who was Herodes Atticus? A wealthy and cultured Greek figure of the 2nd century AD who owned vast properties in the Caffarella Valley, where his villa once stood.

Where is the Nymphaeum of Egeria? In Caffarella Park, along the valley's trails, set in the greenery near the other ancient monuments.

Can you visit it? Yes, it lies along the park's free-entry paths and is admired from the outside. Check for any restrictions on site.

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Article #646 · Category: Monuments · Updated: May 2026