UDINE, a town of Austrian Italy, in a wide plain near the foot of the Carnic Alps, on the Roja, 60 miles N.E. of Venice. It is well built, and enclosed by walls four or five miles in circumference. On a hill near the centre stands the old castle, at one time the residence of the patriarchs of Aquileia, and now used as a prison. The streets are in general narrow and crooked; but some of them are lined with arcades, and there is a fine public square containing a column to commemorate the treaty of Campoformio, concluded, in 1797, at a village of that name, about two miles off. The cathedral is remarkable for its marble pillars, sculptures, and paintings; and of the numerous other churches, some are fine buildings. Udine also contains a town-hall, several palaces of the nobility, courts of law, a gymnasium, lyceum, and other schools, library, museum, theatre, and various hospitals. The Campo Santo of Udine is considered one of the finest cemeteries in Europe; and the town is adorned by many beautiful public walks, constructed by the French when they were in possession. There are here silk and leather factories, a sugar refinery, distilleries, paper and flour mills; and a considerable trade is carried on in silk produced in the neighbourhood. Pop. (1851) 23,464.