Rabenstein Castle was built around 1100 to protect nearby Sankt Paul im Lavanttal. It began as a mere watchtower built on a tall hill. Rabenstein became a castle when Engelbert I Sponheim, Margrave of Istria founded St. Paul's Abbey in 1091 in order to protect the abbey and town around it. The castle was occupied by the Rabensteins (whose name henceforth stuck to the structure) until 1200, the Archbishop of Salzburg until 1300. in 1636 the castle was destroyed by fire and left to decay.
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.