Alsatian is an Alemannic dialect closely related to Swabian and Swiss German, although since World War II most Alsatians primarily speak French. Internal and international migration since 1945 has also changed the ethnolinguistic composition of Alsace. For more than 300 years, from the Thirty Years' War to World War II, the political status of Alsace was heavily contested between France and various German states in wars and diplomatic conferences. The economic and cultural capital of Alsace, as well as its largest city, is Strasbourg, which sits right on the contemporary German international border. The city is the seat of several international organisations and bodies.