Hrádek nad Nisou is a town in the Czech Republic.HistoryUntil 1918, the town was part of the Austrian monarchy (Austria side after the compromise of 1867), in the REICHENBERG (Liberec) district, one of the 94 Bezirkshauptmannschaften in Bohemia. From 1938 to 1945 it was one of the municipalities in Sudetenland.International relationsTwin towns — Sister citiesHrádek nad Nisou is twinned with: Bogatynia, Poland