Sulzbach-Rosenberg is a town in the Upper Palatinate district of Amberg-Sulzbach, about 50 km east of Nuremberg. The town came into being on July 1, 1934 when the town of Sulzbach merged with the municipality of Rosenberg.[2] Until June 30, 1972, it was the district seat of the district of the same name. It is one of 13 so-called efficient district municipalities in Bavaria.
The castle and town regained great importance as the capital of New Bohemia between 1353 and 1373 under Charles IV, who married Anna, the daughter of Count Palatine Rudolf in 1349. As in the early and high Middle Ages, the castle and town benefited from their convenient location on the so-called Golden Road from Nuremberg to Prague and the rich mineral resources (iron ore).
Charles IV rendered outstanding services to the city. For at least 89 days he issued documents at Sulzbach Castle, which thus had the function of a Palatinate. The fact that the emperor never stayed at the castle is a recent invention of local tradition. Charles IV had a new church built and the castle expanded, enriched the hospital and promoted mining. But his son Wenzel pledged the county to Bavaria. As a result of the Landshut War of Succession, in 1505 it went to the Palatine Wittelsbach family.
Source: Wikipedia