Uluabat, in the Byzantine period Lopadion (Greek: Λοπάδιον), Latinized as Lopadium, is a neighbourhood of the municipality and district of Karacabey, Bursa Province, Turkey.

[3] Uluabat is located on the banks of the Mustafakemalpaşa River (ancient and medieval Rhyndacus).

[4] The existence of a 4th-century bridge carrying the road between Cyzicus on the Sea of Marmara to the interior of Asia Minor made it a place of some strategic importance, especially in the wars of the Komnenian emperors against the Seljuk Turks in the 11th–12th centuries, during which it is best known.

[4] It then returned to the Empire of Nicaea, and remained in Byzantine hands until it was captured by the Ottoman Turks in 1335.

[5] In January 1422, the armies of Mehmed's son Murad II and Mustafa Çelebi confronted each other in the area, until Murad engineered the defection of Junayd of Aydın and the other supporters of Mustafa, forcing the latter to retreat to Europe, where he was captured and executed.