A typical multiview postcard showcasing the sights of Freiberg . In the lower right corner is Freudenstein Castle . The current version of the castle was completed in 1577 and formed part of the town’s defensive system during the Thirty Years' War . During the Seven Years' War , the castle’s interior was heavily damaged. In 1784, the military took over the building and converted it into a magazine (an ammunition storage facility). In 1813, it was used as a hospital for 1,500 wounded soldiers. The town of Freiberg assumed ownership in 1957, and the castle served as a granary until 1979. In 1973, a youth club even operated in the basement. From 1980 to 1990, a heritage organization was based at the castle and worked to rest ore it to its 1577 appearance.