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:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.