Sofia's Roman Ruins: A Walking Guide to Ancient Serdica

Sofia might be best known for its gold-domed Alexander Nevsky Cathedral, but beneath the city centre lies a secret that many tourists rush past. The Roman city of Serdica, founded in the 1st century AD, was an important administrative and commercial hub. Today its ruins are scattered around the modern capital, often in plain sight but easy to miss without a guide.

What remains of ancient Serdica

The most impressive showcase is the archaeological complex at the Serdica metro station. When the metro was built, engineers uncovered a large section of the ancient city, including streets, houses and an early Christian basilica. The ruins are now protected under a glass dome, and visitors can walk above them on elevated walkways. It's a rare chance to see a Roman city in the heart of a modern metropolis.

Nearby, the Rotunda of St George is a small brick building dating from the 4th century, thought to be the oldest preserved building in Sofia. Originally a Roman bath or a martyrium, it was converted into a church and is still used for services. The interior contains medieval frescoes, and the surrounding courtyard holds more Roman remains.

The amphitheatre and the ancient streets

Just outside the Serdica complex, the remains of a Roman amphitheatre were discovered in 2004. Only a small section is visible today, tucked between a hotel and a government building, but it gives a sense of the city's scale. Information panels explain the layout, and you can peer down into the excavated arena.

Walking along the Largo, the pedestrian area between the Council of Ministers and the Presidency, you are literally stepping over ancient streets. Glass panels in the pavement reveal original Roman paving stones. These streets connected the city's main gates, and now they connect modern Sofia's key institutions.

How to see the ruins

A circular walk starting from Serdika metro station takes about an hour, covering all the main sights. Start at the metro station ruins, then head to the Rotunda of St George, continue to the amphitheatre fragments, and finish at the Largo. Most sites are outdoors and open at all times, though the Rotunda's interior may have limited visiting hours.

The ruins are easy to combine with other central sights. They are located in the very heart of Sofia, just a short walk from the main shopping streets and the National Archaeological Museum. Because they are outdoors, the best time to visit is during daylight hours in spring, summer or early autumn. In winter, the glass-covered metro complex offers shelter, but the open-air sections can be slippery when cold.

For those interested in history, a visit to Sofia's Roman ruins is a unique experience, showing how a modern capital has grown around and over its ancient past. It requires no special planning or tickets, just a willingness to look down and step back nearly two thousand years.