History of the city of Sofia

The city of Sofia is one of the oldest cities in Europe. ‘Sofia’ is in fact the city’s fifth name-after Serdica, Ulpia Serdica, Sredetz and Triaditza. There is data on Serdica’s existence 5,000 years ago, and the earliest written evidence for residents on the lands of Serdica date back to the middle of the first millennium bc.’ Serdica’ (the emphasis being on the first syllable) is the oldest-known name of the town; it originates from ‘Serdi’- one of the 22 Thracian tribes that formed the numerous Thracian people.