FORENTRÜ, is a town of Switzerland, in Elsgaw, and capital of the territory of the bishop of Basle. It has a good castle, where he resides. It has in it, however, nothing else worth taking notice of, except the cathedral. The bishop is a prince of the empire. It is seated on the river Halle, near mount Jura, 22 miles south of Basle. E. Long. 7. 2. N. Lat. 47. 34.