For a long period of time (since its construction in the late 15th and early 16th centuries) the castle complex was the property of the aristocratic Werdenberg-Sargans family. Later it was used as an official residence of the ruling princely family (since 1938), so you can get inside only on the Independence Day of the Principality (August 15). If you are lucky, the first place to see is St. Anne’s Chapel with its ancient altar in the Gothic style.