Ktenia

Ktenia was a fortress in the eastern Balkan Mountains, guarding the Karnobat Pass through the range. Known in Roman and medieval times, it stood among a chain of strongholds contested by Bulgaria and Byzantium. The Bulgarian emperor Theodore Svetoslav recovered it in 1304, but it changed hands again after the death of his son. Following the Bulgarian victory at Rusokastro in 1332, Ktenia returned once more to Bulgarian rule.