The interior of Macedonia remained in Slavic and later Bulgarian hands until the campaigns of Basil II, which ended the existence of the Bulgarian state and extended Byzantine authority across the central and northern Balkans. Thereafter Macedonia remained under Byzantine control until the Fourth Crusade (1204). A short-lived Latin Kingdom of Thessalonica was established which survived until 1224, when it was captured by Epirus. Most of Macedonia then came under the control of the Empire of Nicaea in 1246, although its northern regions remained disputed with the Serbs and the Bulgarians. Most of the region was conquered by the Serbs under Stephen Dushan during the Byzantine civil war of 1341–1347. Only Thessalonica and its environs remained in Byzantine hands. By the late 14th century, the Ottoman Turks in turn had conquered the region, although Thessalonica held out under Byzantine and later Venetian control until 1430.