(Hung. Rozsno banya), a town of Hungary, in the county and 15 miles N.E. of Gömör, on the Sajo. It contains a large cathedral, episcopal palace, churches, convents, episcopal seminary, Roman Catholic and Protestant grammar schools. The scenery in the vicinity is very fine; and there are near the town mines of iron, copper, lead, and antimony. Rosenau has potteries, bleach-fields, tanneries, breweries, and manufactories of wax-candles. Some trade is carried on in honey, wax, and pease. Pop. 7000.

ROZNAU (Magyar Roznya), another town of the Austrian empire, Transylvania, in the circle and 7 miles S.W. of Kronstadt. It has a strong castle, where is a well 456 feet deep, hewn out of the rock. Flax, tobacco, and honey are produced here. Pop. 4000.