Cardiff (Welsh: Caerdydd ) is the capital of Wales and its largest city. The eleventh-largest city in the United Kingdom, it is Wales' chief commercial centre, the base for most national cultural institutions and Welsh media, and the seat of the National Assembly for Wales. At the 2011 census, the unitary authority area population was estimated to be 346,090, and the wider urban area 479,000. Cardiff is a significant tourist centre and the most popular visitor destination in Wales with 21.3 million visitors in 2017. In 2011, Cardiff was ranked sixth in the world in National Geographic's alternative tourist destinations.