Caerdydd
City and County of Cardiff
Flag Coat of arms
Map of Cardiff with roads and borders
Coordinates: 51°29′N 3°11′W / 51.483°N 3.183°W / 51.483; -3.183Coordinates: 51°29′N 3°11′W / 51.483°N 3.183°W / 51.483; -3.183
Country	United Kingdom
Constituent country	Wales
Area
• Land	54.07 sq mi (140.03 km2)
Population  (2011)
• Total	346,100

Cardiff is the capital and biggest city of Wales. It is also the 11th biggest city in the United Kingdom. Its name in the Welsh language is Caerdydd. A 2011 census says that around 346,100 people live in Cardiff. It is the most important city in Wales for tourism, culture, government, sport, transport, nightlife and business.

Cardiff was declared a city in 1905, and it became the capital of Wales in 1955.