Kladno, a mining town of Bohemia, Austria, 18 m. W.N.W. of Prague by rail. Pop. (1900), 18,600, mostly Czech. It is situated in a region very rich in iron-mines and coal-fields and possesses some of the largest iron and steel works in Bohemia. Near it is the mining town of Buschtĕhrad (pop. 3510), situated in the centre of very extensive coal-fields. Buschtĕhrad was originally the name of the castle only. This was from the 15th century to 1630 the property of the lords of Kolovrat, and came by devious inheritance through the grand-dukes of Tuscany, to the emperor Francis Joseph. The name Buschtĕhrad was first given to the railway, and then to the town, which had been called Buckow since its foundation in 1700. There is another castle of Buschtĕhrad near Hořic. Kladno, which for centuries had been a village of no importance, was sold in 1705 by the grand-duchess Anna Maria of Tuscany to the cloister in Břewnow, to which it still belongs. The mining industry began in 1842.