Kazanlak, known as Seuthopolis in ancient times, is a town in Stara Zagora Province, Bulgaria. It is located in the middle of the plain of the same name, at the foot of the Balkan mountain range, at the eastern end of the Rose Valley. It is the administrative centre of the homonymous Kazanlak Municipality.

Stara Zagora, formerly known as the Stara Zagora okrug, is a province of south-central Bulgaria. It is named after its administrative and industrial centre—the city of Stara Zagora—the sixth-biggest town in the country. The province embraces a territory of 5,151.1 km2 (1,988.9 sq mi) that is divided into 11 municipalities with a total population, as of December 2009, of 350,925 inhabitants.