Assos, also known as Behramkale or for short Behram, is a small historically rich town in the Ayvacık district of the Çanakkale Province, Turkey. During Pliny the Elder's time (1st century CE), the city also bore the name Apollonia (Ἀπολλωνία). The Acts of the Apostles refers to visits by Luke the Evangelist and Paul the Apostle to Assos (Acts 20:13–14) .
Today, Assos is an Aegean-coast seaside retreat amid ancient ruins. Since 2017 it is inscribed in the Tentative list of World Heritage Sites in Turkey.