Hippo Regius

Listen first. Under your shoes, gravel shifts against old paving stones. Somewhere nearby a bird calls from a wild olive tree. The air carries salt from the Mediterranean, which lies just beyond the modern city. Around you, low walls of pale stone rise only knee-high, and grass grows between them. This is Hippo Regius, the ancient city on the edge of Annaba. Most of it now lies at ground level, so you have to read it slowly, like a map spread out on the earth.

The name holds two layers. Hippo probably comes from an old Phoenician word, from the sea traders who set up a harbour here long before Rome arrived. Regius is Latin and means royal. It was added because the kings of Numidia, the Berber kingdom that ruled much of this coast, used the city as one of their residences. So before it was Roman, this was a royal town of North African kings, with a busy port on a sheltered bay.

Rome took control of the region after the fall of Carthage and the slow absorption of Numidia. Hippo grew wealthy under Roman rule. The plains behind it, watered by the Seybouse River, produced grain and olive oil, and ships carried both across the sea. The coastline has moved since then. Silt from the river has pushed the shore outward, so the old harbour now sits inland, under fields and city streets. The sea you can smell was once much closer.

Walk toward the forum, the open public square at the heart of the Roman town. Here citizens met, traded, argued, and read official notices. The paving slabs are large and worn smooth. Many scholars consider this forum one of the oldest known in Roman Africa. Look along its edges for the bases of columns and the lines of buildings that once framed the square. Standing in the middle, you are standing where public life in this city was decided for centuries.

Not far away are the remains of a theatre, cut into a gentle slope. Roman theatres used natural hillsides to support their rows of seats. Plays, music, and public speeches filled this space, and the curve of the seating helped carry voices outward. Much of the stone was taken away in later centuries for other buildings, which is common across the Mediterranean. Still, the semicircle is clear. Try to picture an evening crowd here, with the bay glowing behind the stage.

The baths are another highlight. Romans treated bathing as a daily social ritual, not only as a way to get clean. Visitors moved through cold rooms, warm rooms, and hot rooms heated from below the floor. At Hippo you can still see thick walls and the brick supports that once held up heated floors. Here is a detail many visitors miss — those small brick stacks created a hollow space, and hot air from furnaces flowed through it to warm the stone above.

Now comes the person who made this city famous far beyond Africa. Augustine, later known as Saint Augustine, was born in the town of Thagaste, in what is now eastern Algeria. After years of study and teaching in Carthage, Rome, and Milan, he returned to Africa. In the 390s he became bishop of Hippo. He served here for more than three decades, preaching, settling disputes, and writing some of the most influential works in Christian thought.

It was here that Augustine wrote much of The City of God. He began it after Rome was sacked in 410, when many people asked how such a disaster could happen. His answer shaped Western philosophy for over a thousand years. It is a surprising thought — one of the great books of Europe was written by an African bishop, in a harbour town that most Europeans could not place on a map today.

Augustine's final years were hard. In 430 the Vandals, a Germanic people who had crossed from Spain into North Africa, laid siege to Hippo. Augustine died during the siege, inside the city walls. The Vandals took the city soon after. Ancient accounts say his library survived, which is one reason so many of his writings reached us. The city later passed to the Byzantines, then to Arab rule, and the population gradually shifted to the site of present-day Annaba.

In the Christian quarter of the ruins, you can see the remains of a large basilica, a church built on the Roman hall plan. Some people link it to Augustine himself. Archaeologists still debate this, so treat it as a possibility, not a certainty. What is clear is that Christian worship took place here in late antiquity. Look for the outline of the main hall and the traces of side rooms where clergy may have lived and worked.

Turn your eyes up toward the hill above the ruins. There you will see the Basilica of Saint Augustine, a Catholic church built in the French colonial period, around the turn of the twentieth century. Its pale walls and domes mix Roman, Byzantine, and North African styles. It stands as a later tribute to the bishop who worked below. The contrast is striking — the ancient city lies flat in the grass, while the newer church rises clearly against the sky.

If the on-site museum is open, it is worth your time. Many of the best finds from Hippo are kept there, especially floor mosaics from Roman houses. These mosaics show hunting scenes, sea creatures, and everyday life in strong colours made from tiny cut stones. They help explain how wealthy families here decorated their homes. After seeing them, the bare foundations outside make more sense, because you can imagine those floors in place again.

Before you leave, stand still for a moment. Feel the warmth coming off the stones. Notice the modern city sounds at the edges — traffic, voices, perhaps a call to prayer drifting across the rooftops. Hippo was never truly abandoned. It simply moved a short distance and kept living as Annaba. As you walk back toward the streets, you are following the same path that the city itself took, from old stone to new.