MARIENBURG, a city of West Prussia, in the government of Dantzic, the capital of a circle of the same name. It stands upon the right bank of the river Nogat, one of the arms of the Vistula, over which there is a bridge 560 feet in length. It is surrounded with walls, and has two suburbs, and contains four Catholic churches and one Lutheran, 690 houses, and 5220 inhabitants. It is a very ancient city, in which the antique hall of the knights of the Teutonic order still remains. It has been lately fitted up and decorated in accurate keeping with all the historical relations of that institution. It is a place of some trade, especially in corn, feathers, bristles, and other products of the land. Long. 18. 56. 29. E. Lat. 54. 1. 31. N.