into the valleys of the towns of Panagyurishte and Strelcha, as well as the middle courses of the rivers Luda Yana and Pyasachnik. Sarnena Sredna Gora is the lowest in the range, with most hilly terrain, spanning to the Stryama in the west to the Tundzha in the east. It is limited to the north by the southern reaches of the valleys of Karlovo, Kazanlak, Tvarditsa and Sliven; in the south it gradually descents to the Upper Thracian Plain. There are three sections — Bratanski, Kortenski and Chirpanski. The former is the highest in elevation, spans from the Stryama in the west to the Zmeyovski Pass (430 m) in the east and is dominated by the summit of Bratan (1,236 m). Kortenski section is located eastwards of the Zmeyovski Pass and reaches the easternmost point of the mountain range at Zaychi Vrah; its highest peak in Moruley (895 m). The third section is formed by the Chirpan Heights located south of Bratanski Section, which reaches a maximum heights of 651 m at Kitka. Prehistoric mine The copper ore used for the manufacture of the Varna culture artifacts originated from Sredna Gora mines in the hamlet of Mechi Kladenets (Мечи кладенец) 8 km northwest of Stara Zagora. Varna culture flourished in 4400-4100 BC. Honours The Srednogorie Heights on Graham Land in Antarctica are named after the Srednogorie Mountain Complex. See also Geography of Bulgaria List of mountains in Bulgaria List of mountain ranges Balkan Mountains Vitosha Rila Pirin Rhodope Mountains Notes and references External links The Sredna Gora and the Valley of the Roses Mountains of Bulgaria Landforms of Pazardzhik Province Landforms of Plovdiv Province Landforms of Sliven Province Landforms of Sofia Province Landforms of Stara Zagora Province