During the first half of this period (1185) the Byzantine Empire dominated the Balkans, and under the Komnenian emperors there was a revival of prosperity and urbanization; however, their domination of Southeastern Europe came to an end with a successful Vlach-Bulgarian rebellion in 1185, and henceforth the region was divided between the Byzantines in Greece, some parts of Macedonia, and Thrace, the Bulgarians in Moesia and most of Thrace and Macedonia, and the Serbs to the northwest. Eastern and Western churches had formally split in the 11th century, and despite occasional periods of co-operation during the 12th century, in 1204 the Fourth Crusade treacherously captured Constantinople. This severely damaged the Byzantines, and their power was ultimately weakened by the Seljuks and the rising Ottoman Empire in the 14–15th century. The power of the Latin Empire, however, was short lived after the Crusader army was routed by Bulgarian Emperor Kaloyan in the Battle of Adrianople (1205).