Polignano a Mare is a town and municipality in the Metropolitan City of Bari, Apulia, southern Italy, located on the Adriatic Sea. The local economy mostly depends on tourism, agriculture and fishing.

The area has been settled since prehistoric times, evidenced by archaeological excavations. It is believed to be the site of the ancient Greek city of Neapolis of Apulia. Nowadays, some historians suggest that this latter was one of the two colonies founded during the 4th century BC by Dionysius II of Syracuse; other sources, instead, claim Julius Caesar as the father of Polignano a Mare, which might have been a central hub along the well-known Via Traiana. Thanks to its strategic position on the Adriatic Sea, it soon became a trade centre, at least until the introduction of a Greek coin bearing the "NEAII" inscription.

The foreign dominations led the town to a greater development and recognition. The Byzantine Empire, in the 6th century, turned it into a municipal structure; subsequently, it was dominated by the Normans, who, during the 11th century made the local economy thrive by boosting the production of the olive oil. The fortification of the suburb, on the other hand, has plainly to be attributed to the Angioinians, who secured the protection of the land from potential threats including the Turkish army and the different kinds of epidemics. Under the Aragonese crown, Polignano reached its peak in both economic and cultural terms; this meant business men and merchants coming from different parts of the world meeting there soon afterwards.