Eleutherna (‹See Tfd›Greek: Ἐλεύθερνα), also called Apollonia (‹See Tfd›Greek: Ἀπολλωνία), was an ancient city-state in Crete, Greece, which lies 25 km southeast of Rethymno in Rethymno regional unit. Archaeologists excavated the site, located on a narrow northern spur of Mount Ida, the highest mountain in Crete. The site is about 1 km south of modern town of Eleftherna, about 8 km north east of Moni Arkadiou, in the current municipality of Rethymno. It flourished from the Dark Ages of Greece’s early history until Byzantine times.