BIELAU, frequently distinguished as Langen Bielau, the longest village in the Prussian monarchy. It is situated in the government of Breslau in Silesia, on a tributary of the Piela, and extends for a distance of rather more than four miles. Its industrial establishments are numerous and important, the cotton manufactory alone employing 2000 looms; while bleaching, dyeing, printing, tile-making, and sugar-refining are all extensively carried on. There is an old castle in the village belonging to Count Sandreczky. Population in 1871, 13,070.