The term 'CAPITAL ON THE AAR' is referring to the city of BERNE, which is the capital of Switzerland and is located on the Aar River. BERNE is the fifth most populous city in Switzerland and is the country's de facto capital. It is also the seat of the Swiss federal government and the canton of Bern. BERNE is a major economic hub and is home to numerous international organizations, including the United Nations Office at Geneva.