Basel, also known as Basle, is a city in northwestern Switzerland on the river Rhine. Basel is Switzerland's third-most-populous city with about 175,000 inhabitants. The official language of Basel is German, but the main spoken language is the local Basel German dialect. Basel is commonly considered to be the cultural capital of Switzerland and the city is famous for its many museums, including the Kunstmuseum, which is the first collection of art accessible to the public in the world and the largest museum of art in Switzerland, the Fondation Beyeler, the Museum Tinguely and the Museum of Contemporary Art, which is the first public museum of contemporary art in Europe. Forty museums are spread throughout the city-canton, making Basel one of the largest cultural centres in relation to its size and population in Europe.