Cardiff, Welsh Caerdydd, city and county (1998 est. pop. 320,900), S Wales, on the Taff River near its mouth on the Bristol Channel. Cardiff is the capital of Wales and an important port. Until the early 20th cent. it was one of the greatest coal-shipping ports in the world. Modern industries include retailing, services, engineering, oil and gasoline distribution, and food processing. Studios of the British Broadcasting Corp. are located in Cardiff, which is also the center of the Welsh-language broadcasting industry. The construction of docks by the 5th marquess of Bute in 1839 stimulated the city's growth. The port includes the docks at Penarth and Barry. There is also a canal to Merthyr Tydfil (opened 1794), with a branch to Aberdare.

Cardiff Castle, the residence of the marquess of Bute until 1947, was first built in 1090 on the site of a Roman fort. Robert, duke of Normandy, was imprisoned (1126-34) in the castle. Owen Glendower partly destroyed it in 1404. In Cathays Park the group of public buildings includes the National Museum of Wales, the law courts, and the city hall. The Univ. of Wales, a federal university, has a constituent institution as well as its medical campus and the Univ. of Wales Institute in Cardiff. The former docklands of Cardiff Bay are now the site of the new Senedd (National Assembly) building and a multipurpose cultural center. The city also has a botanic garden. Llandaff, which has a notable medieval cathedral, has been incorporated in Cardiff since 1922. The parish church of St. John dates partly from the 13th and 15th cent., and the Museum of Welsh Life, on the city's outskirts, groups buildings from throughout Wales.

Callaghan of Cardiff, Leonard James Callaghan, Baron, 1912-2005, British statesman. He was first elected to Parliament as a Labour member in 1945. As chancellor of the exchequer (1964-67), he introduced extremely controversial taxation policies, including employment taxes; he resigned when he was forced to accept devaluation of the pound. Prime Minister Harold Wilson then appointed him home secretary (1967-70), and in that post he ordered British troops into Northern Ireland to deal with the rising violence there. Callaghan also served as foreign secretary (1974-76). He succeeded Wilson when the latter resigned as prime minister in 1976. Callaghan was by nature a moderate man, but his government was plagued by inflation, unemployment, and its inability to restrain trade unions' wage demands, and foundered after a series of paralyzing labor strikes in the winter of 1978-79. In the elections later in 1979, the Labour party lost to the Conservatives, led by Margaret Thatcher. Callaghan resigned as party leader in 1980 and was created a life peer in 1987.

City and county (pop., 2001: 305,340), capital of Wales. It is located on the Bristol Channel in southeastern Wales. The Romans built a fort there circa AD 75. The town itself was established with the arrival of the Normans in the 11th century. Its population was small into the early 19th century, but by the early 20th century Cardiff had become the largest coal-exporting port in the world. The coal trade ceased in the 1960s, but Cardiff remains the largest city and the principal commercial centre of Wales.

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