Thracian Anchialus (5th–1st c. BC)
The original settlement was founded in the 5th century BC by Thracians, later becoming a trading emporion of the Greek colony Apollonia Pontica (today's Sozopol). The name Anchialus (Αγχίαλος) means "near the sea". From this era survives the remarkable Thracian Beehive Tomb — a unique round-chamber monument with thick walls, probably a heroön.
Roman Anchialos (1st c. BC – 4th c.)
Under Roman rule Anchialos became an important port and a resort for the Roman aristocracy thanks to its mineral springs. It minted its own coins; a forum, temples and large baths were built. Apostle Andrew visited in the 1st century, bringing Christianity to the town.
Byzantium & mediaeval Bulgaria (5th–14th c.)
Anchialos was an important bishopric of the Byzantine Empire. In 708 Khan Tervel defeated Emperor Justinian II at the Battle of Anchialus. The town changed hands many times between Byzantium and the Second Bulgarian Empire. Remains of early Byzantine basilicas and fortress walls survive.
Ottoman era and National Revival (1453–1878)
Under Ottoman rule Anchialos remained a significant Christian and Greek centre. In 1878, during the Russo-Turkish War, fires destroyed much of the town. From this period dates the monastery of St. George (1856) — one of the few continuously active monasteries on the Black Sea coast.
Modern Pomorie (1878 — today)
After the 1878 Liberation, Anchialos passed to Eastern Rumelia and in 1885 joined the Principality of Bulgaria. In 1934 the town was renamed Pomorie. During the 20th century it grew as a spa resort — the first balneological centre using mud from Pomorie Lake opened in the 1950s.