Chirag Gala, also spelled Çiraq Qala or Çirax Qala, which means lamp (or light) castle in Azerbaijani is a ruined ancient fortress overlooking the Caspian coastal plains north of Baku in Azerbaijan. Its located on the top of a mountain, in the Guba Forest. It was constructed by the Sassanid Persians in the 5th century, it was used as a defense for the khanate of Quba in the 18th century.