BIRLITZ, a duchy in the Austrian government of Moravia and Silesia. It stands on the frontiers of the former kingdom of Poland, between the Vistula and the Beila. It contains one city, and fifteen small towns and villages, with 10,300 inhabitants, mostly of the Slavonic race. The city, of the same name, is a great manufacturing place for fine cloths and cassimeres. The ducal palace and park adjoining are very magnificent. There are two churches for Catholics, and one for Lutherans. The inhabitants are about 5500.