NEUSTADT, or Wiener-Neustadt, a town of Austria, 26 miles S. of Vienna. It is built with some regularity, in the form of a square, and surrounded by fortifications. The streets are broad and well paved. The ancient castle, which is now used as a military academy for the education of officers for the Austrian army, is a square building with a tower; and in the chapel attached to it the Emperor Maximilian I. is buried. This academy, the only one of the kind in the empire, is attended by 468 pupils, who receive their appointments, some from the emperor, and some from the provincial estates. Many of the public buildings of Neustadt were destroyed by a dreadful fire in 1834, which laid nearly the whole of the town in ashes. There is here a Cistercian convent, which has a museum and a library of 20,000 volumes. The manufactures are considerable, consisting of silk and velvet cloth, paper, porcelain, &c.; and an active transit trade in wine, hardware, leather, sugar, &c., is carried on. Neustadt, which is as old as the twelfth century, has obtained, on account of its constant fidelity to the Austrian princes, the designation of "Ever Faithful." Pop. 12,346.