Cardiff (; ) is the capital city of Wales and a county. Officially known as the City and County of Cardiff, it is the United Kingdom's eleventh-largest city and the main commercial centre of Wales. Cardiff is the base for the Senedd (Welsh Parliament), most national cultural institutions and the majority of the Welsh media. At the 2011 census, the unitary authority area population was estimated to be 346,090, and the wider urban area 479,000. In 2011, Cardiff was ranked sixth in the world in the "National Geographic" magazine's list of alternative tourist destinations. Cardiff is the most popular visitor destination in Wales with 21.3 million visitors in 2017.