The oldest settlement in Kazanlak dates back to the Neolithic era (6th-5th millennium BCE). The Thracian city of Seuthopolis was uncovered near Kazanlak. In the 4th century BCE, near the ancient Thracian capital of Seuthopolis and close to the city, a magnificent Thracian tomb was built. It contains painted murals representing a Thracian couple at a ritual funeral feast. The tomb was declared a UNESCO World Heritage Site in 1979.