Schloss Hollenburg is a medieval castle near Köttmannsdorf. It is on a rock of the northern slope of the Drava valley. One Swiker, Lord of Hollenburg in the Duchy of Carinthia was first documented as a witness in the 1142 deed of the foundation of Viktring Abbey. He may have been a liensman of the ducal House of Sponheim; his son Reginher is mentioned as Lord of Steuerberg, he accompanied King Conrad III of Germany on the Second Crusade in 1147 and later appeared as a ministerialis of Margarve Ottokar IV of Styria.
The castle was of strategical importance due to its location at a Drava river crossing and the road to the Loibl Pass and the March of Carniola. Upon the extinction of the Hollenburg dynasty in 1246, it passed to the Styrian Lords of Pettau, in 1438 it was inherited by the House of Stubenberg. The structure had been severely damaged by the 1348 Friuli earthquake.
In 1514 the Habsburg emperor Maximilian I, stuck in the War of the League of Cambrai against Venice and highly indebted, sold Hollenburg to Lord Siegmund of Dietrichstein, elevating him to the rank of a Freiherr (Baron). The House of Dietrichstein had the castle rebuilt in a Renaissance style, finished in 1588. The Dietrichsteins held the castle until the extinction of the branch in 1861, it was acquired by the Wittgenstein family in 1913.References:
Augustusburg Palace represents one of the first examples of Rococo creations in Germany. For the Cologne elector and archbishop Clemens August of the House of Wittelsbach it was the favourite residence. In 1725 the Westphalian architect Johann Conrad Schlaun was commissioned by Clemens August to begin the construction of the palace on the ruins of a medieval moated castle.
In 1728, the Bavarian court architect François de Cuvilliés took over and made the palace into one of the most glorious residences of its time. Until its completion in 1768, numerous outstanding artists of European renown contributed to its beauty. A prime example of the calibre of artists employed here is Balthasar Neumann, who created the design for the magnificent staircase, an enchanting creation full of dynamism and elegance. The magical interplay of architecture, sculpture, painting and garden design made the Brühl Palaces a masterpiece of German Rococo.
UNESCO honoured history and present of the Rococo Palaces by inscribing Augustusburg Palace – together with Falkenlust Palace and their extensive gardens – on the World Heritage List in 1984. From 1949 onwards, Augustusburg Palace was used for representative purposes by the German Federal President and the Federal Government for many decades.
In 1728, Dominique Girard designed the palace gardens according to French models. Owing to constant renovation and care, it is today one of the most authentic examples of 18th century garden design in Europe. Next to the Baroque gardens, Peter Joseph Lenné redesigned the forested areas based on English landscaping models. Today it is a wonderful place to have a walk.