Rosenburg castle is one of Austria's most visited Renaissance castles. It is situated in the middle of a nature reserve which adds to its appeal. The Rosenburg was mentioned in a document for the first time in 1175, in relation to the area of the border along the Kamp River between Poigreich and the Babenberg settlements with the centres, the Benedictine Altenburg Abbey and the Gars-Thunau castle complex.
The Grabner brothers acquired the Rosenburg in 1487. From 1593–97, under the rule and by order of Sebastian Grabner, a Lutheran, most of the Gothic Rosenburg was demolished and the castle was reconstructed in Renaissance style with 13 towers. The Rosenburg remained in the possession of the Grabner family until 1604.
Finally, the Rosenburg became the property of the House of Sprinzenstein. A period of neglect followed, then several tragedies struck. Lightning caused a fire in 1721, and another fire broke out in 1751 which destroyed part of the courtyard gate and the chapel. In 1800, another fire damaged the Rosenburg; it was barely used for some 60 years thereafter. Fortunately, the Romantic Era caused a renewed interest in castles, and the castle was renovated by Count Ernst Carl von Hoyos-Sprinzenstein senior rebuilt the castle at great personal expense between 1859 and 1889. The castle is now a museum.
References:Duino Castle was built by the Wallsee family in 1389 on the cliffs overlooking the Gulf of Trieste. It replaced an older castle from the 11th century. Over time, the Wallsee family disappeared and the castle, after having been used as a prison, became the residence of the Luogar and Hofer.
At the end of the 19th century it became the property of Prince Alexander von Thurn und Taxis from the Czech branch of the House of Thurn and Taxis. It remains with the family to this day with his great-grandson Prince Carlo Alessandro della Torre e Tasso, Duke of Castel Duino the current owner. The castle has been opened to the public as a museum and park.