The Turks are the largest single immigrant group in Austria, closely followed by the Serbs. Serbs form one of the largest ethnic groups in Austria, numbering around 300,000 people. Historically, Serbian immigrants moved to Austria during the time of the Austro-Hungarian Empire, when Vojvodina was under Imperial control. Following World War II the number of Serbs expanded again, and today the community is very large. The Austrian Serbian Society was founded in 1936. Today, Serbs in Austria are mainly found in Vienna, Salzburg, and Graz.