Belgium, officially the Kingdom of Belgium, is a founding member of the European Union and hosts the EU's headquarters as well as the offices of other major international organisations. Belgium is a constitutional, popular monarchy and a parliamentary democracy with a service-oriented, strongly globalised economy. Located at the heart of Western Europe, its ground and air transportation infrastructure is well integrated with the rest of Europe and the world. Its three official languages are Dutch, French, and German; its currency is the Euro. Alter Domus’ office is located in the capital city, Brussels.