Plovdiv is the second-largest city in Bulgaria and the most populous city in the Bulgarian part of the historic region of Thrace, located 144 km southeast of the capital Sofia. It had a population of 329,489 as of 2024 and 540,000 in its greater metropolitan area. An important economic, transport, cultural, and educational hub of Bulgaria, Plovdiv was the European Capital of Culture in 1999 and 20…