Serdica, Ancient Roman city in central Sofia, Bulgaria.
Serdica preserves extensive remains of Roman streets, residential buildings, public baths, and two early Christian basilicas dating from the 2nd to 6th centuries beneath modern Sofia.
Founded by the Serdi tribe and conquered by Romans around 29 BCE, Serdica became a significant municipium and birthplace of emperors Aurelian and Galerius during Roman rule.
The site hosted the Council of Serdica in 343 and features the Episcopal basilica of Protogenes, one of the earliest Christian basilicas in the region from the 4th century.
The archaeological exhibition is open Tuesday through Sunday beneath Nezavisimost Square, with entry requiring only a metro ticket costing about one Bulgarian lev or 60 cents.
The Serdica II Metro station displays ancient artifacts in glass cases on its platform, including Neolithic pots and Roman columns found during construction between 2010 and 2012.
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