Aesepus Bridge (Turkish Güvencin Köprüsü “Dove Bridge”) is a historic bridge crossing the historic Aesepus River (modern Gönen Çayı). It is almost 20 km north of Gönen in Balıkesir Province, historic Mysia/Hellespont.

The bridge was located on the Roman road along the southern shore of the Sea of Marmara between Kyzikos and Priapos. While the bridge has Late Antique foundations, it was substantially rebuilt in the first half of the thirteenth century when the Laskarid dynasty ruled the empire from Nicaea. Its first construction phase has been dated from the fourth to the sixth centuries. An inscription discovered in the area records the construction of a bridge by Constantine I, which is perhaps connected to its early phase. Two milestones from the reign of Jovian (363-364) were also discovered in the region. The bridge was in ruins by the nineteenth century.

The bridge had a length of almost 160 m and a maximum width of 5.6 m. Its original construction was rubble faced with ashlar. It originally had four large arches over the river, with two smaller ones to the west and five smaller ones to the east. Its four main piers have pointed breakwaters facing the river. The restoration of the bridge included major work on the main piers, which have parallel walls with hollow spaces between them that once supported a Byzantine road. Some of its surviving arches also have repairs with alternating brick and stone courses.