In the early 13th century, a revived Bulgarian Empire gained control of the region. Plagued by political difficulties, the empire did not last, and the region came once again under Byzantine control in the early 14th century. In the 14th century, it became part of the Serbian Empire. Skopje became the capital of Tsar Stefan Dušan's empire. Following Dušan's death, a weak successor appeared, and power struggles between nobles divided the Balkans once again. These events coincided with the entry of the Ottoman Turks into Europe.