London is the most populous city in the European Union, with an estimated population on 1 January 2005 of 7,421,328 and a metropolitan area population of aproximately 12 million. London's population includes a very diverse range of peoples, cultures, and religions, making it one of the most cosmopolitan cities in Europe, and the world. A resident of London is referred to as a Londoner. Over 300 languages are spoken in London, making the capital the most linguistically diverse city in the world. London is the home of many global institutions, organisations and companies, and as such retains a leading role in global affairs. It has a great number of important buildings, including world-famous museums, theatres, concert halls, airports, railway stations, palaces, and offices. It is also the location of many foreign embassies, consulates and High Commissions.