Archeological level of the St. Sophia Basilica

Beneath the stones of the modern-day Saint Sophia Basilica lies one of Bulgaria’s most significant archaeological treasures. This underground museum, preserved in situ, covers over 600 square meters and reveals the evolution of the Eastern Necropolis of ancient Serdica, alongside the remains of three earlier Christian churches.

A Succession of Sacred Temples

The site has been a spiritual center for centuries, with four distinct churches built atop one another:

• The First Church (Early 4th Century): Constructed shortly after the legalization of Christianity in the Roman Empire. Its floors were adorned with exquisite multicolored mosaics.
• The Second and Third Churches (Late 4th – Early 5th Century): As the Christian community grew, each new structure was built larger and more impressive than the last.
• The Current Basilica (Late 5th – Early 6th Century): The magnificent red-brick structure we see today, under whose floor the subterranean museum is located.

Masters of Funerary Architecture

The museum showcases approximately 50 tombs, providing a window into the burial customs of Late Antiquity:

• The Tomb of Honorius: A highlight of the collection dating from the 5th century. It features a vaulted ceiling and a rare red-letter inscription: "Honorius, Servant of God."
• The Painted Tomb (№ XVI): Renowned for its artistic richness, its walls mimic the marble cladding of a wealthy Roman residence. The vaulted ceiling is scattered with painted red poppies – an ancient symbol of eternal sleep and the infinite.

The "Paradise" Mosaic

One of the most valuable artifacts is the altar mosaic from the earliest church. Created using the opus tessellatum technique, it depicts the Garden of Eden:

• Symbolism: Two cypress trees, representing eternity and the balance of masculine and feminine principles, flank a baptismal font surrounded by birds of paradise. Visitors can view a stunning 3D representation of the mosaic exactly where the original once lay.