Descend deep beneath the modern capital to discover the Archaeological Level of St. Sofia Basilica – a truly captivating underground world revealing the millennia-old history of the city. Located beneath the majestic basilica, this site is a unique time capsule, transporting visitors back through centuries of civilizations that shaped present-day Sofia. As you wander through the well-lit underground galleries, you'll walk upon the remains of an ancient Roman necropolis, dating back to the 2nd-4th centuries AD. Before your eyes, numerous sarcophagi and brick tombs will unfold – testaments to the burial practices of the citizens of ancient Serdica. You will see the foundations of several earlier Christian churches that predated the current basilica, clearly illustrating the millennia-long spiritual continuity of this sacred place. Fragments of Roman streets, dwellings, and early Christian mosaics complete the picture of the vibrant life that thrived here centuries ago. The atmosphere is both solemn and inspiring, offering a profound perspective on Sofia's roots and its role as a crossroads of civilizations. A visit to the Archaeological Level is a must for anyone wishing to feel the pulse of ancient Serdica and understand the true depth of the Bulgarian capital. It is one of the most significant archaeological treasures, offering a unique glimpse into the city's multifaceted past – a place where history comes alive with every step.