ROSENAU (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.