Tylis (Greek: Τύλις) or Tyle was a short-lived Balkan Kingdom mentioned by Polybius that was founded by Celts led by Comontorius
in the 3rd century BC. Following their invasion of Thrace and Greece in 279 BC, the Gauls were defeated by the Macedonian
king Antigonus II Gonatas in the Battle of Lysimachia in 277 BC, after which they turned inland to Thrace and founded their
kingdom at Tylis. It was located near the eastern edge of the Haemus (Balkan) Mountains in what is now eastern Bulgaria.