The geographical center of Bulgaria - between the Stara Planina and Sredna Gora mountains - is known as the Rose Valley. For centuries the fragrant Bulgarian rose has been grown there and the attar of roses is extracted fro the production of rose oil. There, 40 years ago, in the town of Kazanluk a small Thracian Tomb was found, with murals which are of exceptional interest in the world's cultural heritage. The settlements in the Rose Valley date from ancient times. A Neolithic settlement (5,000 - 4,000 B.C.) was found in the western area of Kazanluk. The excavations revealed that the settlement had existed during the Stone-Copper Age and during the first half of the Bronze Age ( 4,000 - 3,000 B.C.). The next settlers in the Rose Valley were the Thracians. Their way of life and knowledge were based on the conditions and prerequisites established by their predecessors. The numerous burial mounds in the Kazanluk area (more than 500), together with the remains of Thracian settlements - including Seuthopolis, the only Thracian city that has been completely excavated, preserved and researched, show that the area was inhabited by a large Thracian population, which reached the height of its cultural development during the 5 th - 3rd Centuries B.C.