Archaeological complex "Serdika"
The city center of Sofia is in fact among the best sources of knowledge of the ancient and medieval way of life in these places. Modern-day Sofia city sits atop the ruins of millennia-old buildings, witnesses of glorious past times. Layers of important ancient structures lie just beneath the modern street level. Their foundations were laid by the Thracian tribe Serdi - the earliest known inhabitants of Sofia. Their settlement gradually expanded and at the end of the 3rd century AD. Serdika became a large urban area with particular administrative significance, frequently visited and favored by Emperor Constantine the Great himself.
Nowadays, we have the unique opportunity to be able to walk along sections of ancient Roman roads, paved with the authentic stones. The remains of the ancient Serdika fortress are on display in the underpass between the Presidency and the Council of Ministers in Sofia City, where you could see the eastern section and gate of Serdika fortress wall. After that, you could visit one of the main streets of Roman Serdica, near the Rotunda of "St. George" in the courtyard of the Presidency. In addition, not too far from there, the restored remains of the northwestern wall are presented in the subterranean chambers of the Central Market Hall. The city forum was situated beneath the present-day Sveta Nedelya Square and we can still enjoy sections of it.
In the subway underpass there are parts of the Roman city as well. In conclusion – some of the most interesting landmarks in the Historical and Archaeological complex of “Serdika - Sredets" are the "Western Gate of Serdica" Archaeological complex; the Eastern Gate; The church of "St. Spas "; The Church of “St. Petka of the Saddlers', The Church of "St. George”(The Rotunda).