Geneva is the second-most-populous in Switzerland (after Zurich), Geneva metropolitan area has a population of 1.24 million, according to census 2007. Geneva is a global city, financial center, and centers around the world for diplomacy and international center of the most important because of the various international organizations, including the headquarters of many UN agencies and Red Cross. It is also the place where the Geneva Convention was signed, which mainly concerns the wartime treatment of non-combatants and prisoners of war. Geneva has been described as a third of Europe's financial center after London and Zurich, and the center of the world's eighth most important finance by Global Financial Centres Index, and according to a 2009 survey by Mercer found Geneva to have the third highest quality for the cost of living in the world. In 2009, Geneva was ranked as the fourth most expensive city in the world.
