The well-known Austrian folk song "Es liegt ein Schloss in Österreich" ("There is a castle in Austria") is often assumed to refer to the Rosenburg.

In 1476 the Rosenburg was vastly extended under the rule of Count Kaspar von Rogendorf, chamberlain of Emperor Frederick III.

Their descendants adopted the Protestant faith in the course of the 16th century and made Rosenburg a center of Austrian Reformation history.

[5] From 1593 to 1597, under the rule and by order of Sebastian II Grabner, most of the Gothic Rosenburg was demolished and the castle was reconstructed in Renaissance style with 13 towers.

A tavern feeds the hungry crowds and people in fancy historic costumes do performances in falconry with all sorts of birds of prey.

On a site that was little used for medieval tournaments in that period, mock ones in historic costumes are now regularly held to entertain Rosenburg visitors.

The popularity of the Rosenburg was increased even more when a collector's coin was minted by the Austrian National Bank in 1999—depicting the castle, including falcons and knights.

Attractions nearby include the Baroque monastery of Altenburg, the medieval town of Horn, and neighboring Gars am Kamp and Eggenburg.