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Paris is today one of the world's leading business and cultural centres, and its influences in politics, education, entertainment, media, fashion, science, and the arts all contribute to its status as one of the world's major global cities. It hosts the headquarters of many international organizations such as UNESCO, the Organisation for Economic Co-operation and Development, the International Chamber of Commerce or the informal Paris Club. Paris is considered as one of the greenest and most liveable cities in Europe. It is also one of the most expensive. Paris and the Paris Region, with -552.1 billion in 2009, produce more than a quarter of the gross domestic product of France. According to 2008 estimates, the Paris agglomeration is Europe's biggest or second biggest city economy and the sixth largest in the world. The Paris region has the highest concentration of higher education students in the European Union, is the first in Europe in terms of research and development capability and expenditure and is considered as one of the best cities in the world for innovation. With about 17 million foreign tourists annually, Paris is the most visited city in the world. The city and its region contain 3,800 historical monuments and four UNESCO World Heritage Sites. |