Roggeborgen was a residence of Strängnäs bishop since 1626. The building was constructed by bishop Kort Rogge (1479-1501) in the late 1400s. Between 1626 and 1930 it functioned as a Gymnasium. Today it is a library including 70000 old articles from the episcopate of Strängnäs.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.