Lüleburgaz, also known as Bergoule or Arcadiopolis, is the largest city in the Kırklareli Province of Turkey's Marmara region. It serves as the administrative seat of the Lüleburgaz District and has a recorded population of 125,404 as of 2022.
Situated within the historic region of East Thrace in Rumelia, the city is located near the international borders of Bulgaria and Greece. The local population is characterized by a significant presence of Balkan Turks who immigrated to Turkey from Albania, Bulgaria, Greece, Romania, and ex-Yugoslavia starting in the 19th century.