Sandžak, also known as Sanjak, is a historical geo-political region in Serbia and Montenegro. The name Sandžak derives from the Sanjak of Novi Pazar, a former Ottoman administrative district founded in 1865. Serbs usually refer to the region by its medieval name of Raška. Between 1878 and 1909 the region was placed under Austro-Hungarian occupation, following which it was ceded back to the Ottoman Empire. In 1912 the region was divided between the kingdoms of Montenegro and Serbia. The most populous city in the region is Novi Pazar in Serbia.